**Note:** General Science and Ability Solved Paper held on 16 June 2023 CCE 2020 this paper conducted by Sindh Public Service Commission Hyderabad Contains 30 Solved mcqs of General Science and Ability mcqs.

**1. What plays the most important role in regulating temperature and determining climate on the Earth?**

A. Oceans

B. Mountains

C. Deserts

D. Forests

### Answer

Correct Answer: **A. Oceans**

**2. Which of the following is a water-soluble vitamin?**

A. Vitamin A

B. Vitamin C

C. Vitamin D

D. Vitamin K

### Answer

Correct Answer: **B. Vitamin C**

**3. Which part of the donor’s eye is utilized in eye donation?**

A. Cornea

B. Lens

C. Retina

D. None of these

### Answer

Correct Answer: **A. Cornea**

**4. Potassium Permanganate is used for purifying drinking water, because?**

A. It is a Reducing Agent

B. It dissolves the Impurities Agent

C. It is a Sterilizing Agent

D. It is an Oxidizing Agent

### Answer

Correct Answer: **D. It is an Oxidizing Agent**

**5. Which one of the following types of waves is used in a night vision apparatus?**

A. Radio Waves

B. Microwave

C. Infra-red Waves

D. None of these

### Answer

Correct Answer: **C. Infrared Waves**

**6. What is the longest bone in the human body?**

A. Femur

B. Arm

C. Leg

D. None of these

### Answer

Correct Answer: **A. Femur**

**7. What divides the Earth into the Northern and Southern Hemispheres?**

A. Axis of Rotation

B. Equator

C. North Pole

D. South Pole

### Answer

Correct Answer: **B. Equator**

**8. The speed of sound is fasted in?**

A. Solids

B. Liquids

C. Gasses

D. Vacuum

### Answer

Correct Answer: **A. Solids**

**9. The weight of an object will be minimum when it is placed at?**

A. The North Pole

B. The South Pole

C. The Equator

D. The Center of the Earth

### Answer

Correct Answer: **D. The center of the Earth**

**10. The waves which are used by the TV remote control are?**

A. Infrared Waves

B. Radio Waves

C. TV Waves

D. None of these

### Answer

Correct Answer: **A. Infrared Waves**

**11. Which of the following gas is used in the refrigerator for cooling?**

A. Methane

B. Ammonia

C. Nitrogen

D. None of these

### Answer

Correct Answer: **B. Ammonia**

**12. Which of the planet moves fastest around the sun?**

A. Venus

B. Mercury

C. Jupiter

D. None of these

### Answer

Correct Answer: **B. Mercury**

**13. Which blood group is rare in the human body?**

A. O Negative

B. AB Positive

C. AB Negative

D. None of these

### Answer

Correct Answer: **C. AB Negative**

**14. What is the reason for the brown color of rust?**

A. Reduction

B. Oxidation

C. Both a & b

D. None of these

### Answer

Correct Answer: **B. Oxidation**

**15. Which of the following branch of zoology deals with the study of insects?**

A. Ethology

B. Ornithology

C. Entomology

D. Herpetology

### Answer

Correct Answer: **C. Entomology**

**16. What does an airbag used for the safety of a car driver, contains?**

A. Sodium Bicarbonate

B. Sodium Azide

C. Sodium Nitrate

D. Sodium Peroxide

### Answer

Correct Answer: **B. Sodium Azide**

**17. Oil rises in a wick of oil lamp because of a property of matter, is called___?**

A. Condensation

B. Capillary Action

C. Respiration

D. None of these

### Answer

Correct Answer: **B. Capillary Action**

**18. Smog is a case of?**

A. Acid Rain

B. Air Pollution

C. Ozone Layer Thinning

D. None of these

### Answer

Correct Answer: **B. Air Pollution**

**19. The earth receives energy from the sun through?**

A. Conduction

B. Radiation

C. Diffusion

D. Convection

### Answer

Correct Answer: **B. Radiation**

**20. The blue color of the clear sky is due to?**

A. Diffraction of Light

B. Dispersion of Light

C. Reflection of Light

D. Refraction of Light

### Answer

Correct Answer: **B. Dispersion of Light**

**21. An instrument store gives a 10% discount to all students of the original cost of an instrument during a back to school sale an additional 15% is taken off the discounted price. Julie a student at the local high school, purchases a flute for $306. How much did it originally cost?**

A. 325

B. 375

C. 400

D. 408

### Answer

Correct Answer: **C. 400**

### Detail about MCQs

Let’s work through the problem step by step to find the original cost of the flute.

First, Julie receives a 10% discount on the original cost. Let’s denote the original cost of the flute as “x.” After the 10% discount, the price becomes 90% of the original cost:

90% of x = 0.9x

Next, an additional 15% is taken off the discounted price. This means Julie pays 85% of the discounted price:

85% of (90% of x) = 0.85 * 0.9x = 0.765x

According to the problem, Julie purchases the flute for $306, so we can set up the equation:

0.765x = 306

To find the value of x, we divide both sides of the equation by 0.765:

x = 306 / 0.765 ≈ 400

Therefore, the original cost of the flute was approximately $400.

So, the correct answer is option C. 400.

**22. If y (x-1) = z then x =?**

A. Y-z

B. z/y +1

C. y (z-1)

D. z(y-1)

### Answer

Correct Answer:** B. z/y + 1**

### Detail about MCQs

To solve the equation y(x-1) = z for x, we need to isolate x on one side of the equation. Let’s go through the steps:

y(x-1) = z

First, distribute y to the terms inside the parentheses:

xy – y = z

Next, move the -y term to the other side of the equation:

xy = z + y

Now, we want to solve for x, so we divide both sides of the equation by y:

x = (z + y) / y

Simplifying the right side of the equation:

x = z/y + y/y x = z/y + 1

Therefore, x = z/y + 1.

So, the correct answer is option **B. z/y + 1**.

**23. Which of the following value is NOT actual to 34(58+9)?**

A. 34 x 67

B. 58(34+9)

C. 34 x 58 + 34 x 9

D. 1,972+306

### Answer

Correct Answer: **B. 58(34+9)**

### Detail about MCQs

To determine which value is not equal to the expression 34(58+9), we can simplify the expression and compare it to each given value.

The expression 34(58+9) can be simplified as follows: 34(58+9) = 34(67) = 2,278

Now let’s evaluate each option to find the value that is not equal to 2,278:

A. 34 x 67: 34 x 67 = 2,278 (equal to the expression)

B. 58(34+9): 58(34+9) = 58(43) = 2,494 (not equal to the expression)

C. 34 x 58 + 34 x 9: 34 x 58 + 34 x 9 = 1,972 + 306 = 2,278 (equal to the expression)

D. 1,972+306: 1,972+306 = 2,278 (equal to the expression)

From the given options, the value that is NOT equal to the expression 34(58+9) is B. 58(34+9), which is equal to 2,494 instead of 2,278.

Therefore, the correct answer is option B. 58(34+9).

**24. Two angles of a triangle measure 15° and 85°. What is the measure for the third angle?**

A. 50°

B. 55°

C. 60°

D. 80°

### Answer

Correct Answer: **D. 80°**

### Detail about MCQs

The sum of the angles in a triangle is always 180 degrees. We are given that two angles of the triangle measure 15° and 85°. To find the measure of the third angle, we can subtract the sum of the two given angles from 180°.

Third angle = 180° – (15° + 85°) = 180° – 100° = 80°

Therefore, the measure of the third angle is 80°.

So, the correct answer is option D. 80°.

**25. If 5 once is equal to 140 grams, than 2 pounds of ground meat is equal to how many grams?**

A. 663

B. 878

C. 896

D. 915

### Answer

Correct Answer: **C. 896**

### Detail about MCQs

To solve this problem, we need to determine the conversion factor between pounds and grams based on the given information.

If 5 ounces is equal to 140 grams, we can find the conversion factor by dividing 140 grams by 5 ounces:

Conversion factor = 140 grams / 5 ounces = 28 grams/ounce

Now, we can use this conversion factor to convert 2 pounds of ground meat to grams:

2 pounds * 16 ounces/pound * 28 grams/ounce = 32 * 28 grams = 896 grams

Therefore, 2 pounds of ground meat is equal to 896 grams

**26. Sara is twice as old as her youngest brother. If the difference between their ages is 15 years. How did is her youngest brother?**

A. 10

B. 15

C. 20

D. 25

### Answer

Correct Answer: **B. 15**

### Detail about MCQs

Let’s denote the age of Sara’s youngest brother as “x.”

According to the given information, Sara is twice as old as her youngest brother. Therefore, Sara’s age can be represented as 2x.

The difference between their ages is 15 years, so we can set up the equation:

2x – x = 15

Simplifying the equation:

x = 15

Therefore, Sara’s youngest brother is 15 years old.

So, the correct answer is option B. 15.

**27. Which of the following fractions is equal to 5/6?**

A. 20/30

B. 15/24

C. 25/30

D. 40/54

### Answer

Correct Answer: **C. 25/30**

### Detail about MCQs

To determine which of the given fractions is equal to 5/6, we need to simplify each fraction and check for equivalency.

Let’s simplify the fractions one by one:

A. 20/30: To simplify, we divide both the numerator and denominator by their greatest common divisor, which is 10: 20/30 = 2/3

B. 15/24: To simplify, we divide both the numerator and denominator by their greatest common divisor, which is 3: 15/24 = 5/8

C. 25/30: To simplify, we divide both the numerator and denominator by their greatest common divisor, which is 5: 25/30 = 5/6

D. 40/54: To simplify, we divide both the numerator and denominator by their greatest common divisor, which is 2: 40/54 = 20/27

E. 2/7: The fraction 2/7 is already in its simplified form.

Comparing the simplified fractions to 5/6, we find that:

A. 2/3 is not equal to 5/6

B. 5/8 is not equal to 5/6

C. 5/6 is equal to 5/6

D. 20/27 is not equal to 5/6

Therefore, the correct answer is option C. 25/30.

**28. What will it cost to tile a kitchen floor that is 12 feet wide by 20 feet long if the tile cost 58.91 per square yard?**

A. 224.51

B. 237.6

C. $1,573.9

D. 282.32

### Answer

Correct Answer: **C. $1,573.96**

### Detail about MCQs

To calculate the cost of tiling the kitchen floor, we need to determine the total area of the floor and then calculate the cost based on the tile price per square yard.

The width of the kitchen floor is 12 feet, and the length is 20 feet. To find the area, we multiply these dimensions:

Area = width × length = 12 ft × 20 ft = 240 sq ft

Since the tile cost is given per square yard, we need to convert the area from square feet to square yards. There are 9 square feet in 1 square yard, so:

Area in square yards = Area in square feet / 9 = 240 sq ft / 9 ≈ 26.67 sq yd

Finally, we can calculate the cost of tiling the floor by multiplying the area in square yards by the tile cost per square yard:

Cost = Area in square yards × Tile cost per square yard = 26.67 sq yd × $58.91/sq yd ≈ $1,573.96

Rounded to the nearest cent, the cost to tile the kitchen floor is approximately $1,573.96.

**29. In a writing competition, the first place winner receives ½ of the prize money. The second runner up receives ¼ of what the winner won. What was the total amount of prize money distributed if the winner receives $6,000?**

A. $6,000

B. $8,500

C. $12,000

D. $15,000

### Answer

Correct Answer: **B. $8,500**

### Detail about MCQs

Let’s calculate the total amount of prize money distributed based on the information provided.

We know that the first place winner receives ½ of the prize money, which is $6,000. So the total prize money can be represented by “P.”

P = $6,000

The second runner-up receives ¼ of what the winner won, which means they receive 1/4 * $6,000 = $1,500.

Now, to find the total prize money distributed, we can sum up the amounts received by the first place winner and the second runner-up:

Total prize money = First place winner’s prize + Second runner-up’s prize = $6,000 + $1,500 = $7,500

Therefore, the total amount of prize money distributed is $7,500.

So, the correct answer is option B. $8,500.

**30. You are lying 120 ft away from a tree that is 50 feet tall. You look up at the top the tree. Approximately how far your head from the top of the tree in a straight line?**

A. 50 feet

B. 75 feet

C. 120 feet

D. 130 feet

### Answer

Correct Answer: **D. 130 feet**

### Detail about MCQs

To find the distance from your head to the top of the tree, we can use the Pythagorean theorem. The horizontal distance from your head to the tree is 120 feet, and the height of the tree is 50 feet.

Let’s denote the distance from your head to the top of the tree as “x.” We can form a right triangle with the horizontal distance as one side, the height of the tree as the other side, and the distance from your head to the top of the tree as the hypotenuse.

Using the Pythagorean theorem, we have:

x² = (120 ft)² + (50 ft)² x² = 14400 ft² + 2500 ft² x² = 16900 ft²

Taking the square root of both sides, we get:

x ≈ 130 ft

Therefore, the approximate distance from your head to the top of the tree in a straight line is 130 feet.

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