CAPF (AC) 2015 (Paper-1) (Question 51-100)

Total Questions: 50

21. Which one of the following statements regarding baking powder is NOT correct?

The next two (02) items are based on the following Table: The following table shows the frequency distribution of weekly wages of 65 employees :

Wages (in Rupees)No. of employees
251-2608
261-27010
271-28016
281-29014
291-30010
301-3105
311-3202

 

Correct Answer: (d) It does not contain sodium bicarbonate
Solution:Baking powder is a dry chemical leavening agent, a mixture of a carbonate or bicarbonate and a weak acid. It is used to increase the volume and lighten the texture of baked goods.

It works by releasing carbon dioxide gas into a batter or dough through an acid-base reaction, causing bubbles in the wet mixture to expand and thus leavening the mixture. In baked goods, yeast can be replaced with an equal amount of baking powder. Therefore, option (d) is correct.

22. What is the percentage of employees earning less than Rs. 301 per week but more than Rs. 260 per week?

Correct Answer: (b) 76.9
Solution:Employees earning more than ₹260 per week and less than 301 per week

= 10 + 16 + 14 + 10 = 50

Total employees = 65

Required percentage = 50/65 × 100 = 76.9%

23. What is the difference between the percentage of employees earning between Rs. 261 and Rs. 300 per week and employees earning less than Rs. 281 per week?

Correct Answer: (c) 24.6%
Solution:Number of employees earning between ₹ 261 and ₹ 300 per week

= 10 +16 +14 +10 = 50

Number of employee less than ₹ 281

= 8 + 10 + 16 = 34

Total employees = 65

Required difference = (50-34)/65 × 100

= 16/65 × 100 = 24.6%

24. Which one of the following factors is NOT connected with planetary wind system?

Correct Answer: (c) Earth's revolution around the Sun
Solution:The rotation of the earth is responsible for the generation of Coriolis force, which impacts the direction of planetary winds. The wind is the natural movement of air or other gases relative to a planet's surface.

The two main causes of large-scale atmospheric circulation are the differential heating between the equator and the poles, and the rotation of the planet (Coriolis Effect). In this system, the three main types of planetary winds are the trade winds, the westerlies, and the easterlies. Therefore, option (c) is correct.

25. Match List-I with List-II and select the correct answer using the code given below the Lists:

List-I (Volcano type)List-II (Location)
A. Shield Volcano1. Indonesia
B. Composite Volcano2. India
C. Caldera3. Hawaii
D. Flood Basalt Provinces4. Philippines

 

Code:ABCD
(a)2413
(b)2143
(c)3142
(d)3412
Correct Answer: (d)
Solution:Hawaii's main volcanoes are "shield" volcanoes, which produce lava flows that form gently sloping, shield-like mountains. They are large volcanoes composed of fluid lava flows. Composite volcanoes are usually found at destructive plate margins, such as the Philippines. Caldera volcano is located in Indonesia. The Deccan plateau in the Western Ghats which are located in India is known as the flood basal region. On the ocean floor, they produce oceanic plateaus. Therefore, the correct option is (d).

26. Match List-I with List-II and select the correct answer using the code given below the Lists:

List-I (Compound)List-II (Colour)
A. Urea1. Blue
B. Hydrous copper sulphate2. White
C. Lead sulphide3. Pinkish purple
D. Potassium permanganate4. Black

 

Code:ABCD
(a)2143
(b)2413
(c)3412
(d)3142
Correct Answer: (a)
Solution:Urea is found in white. It is an organic compound and has the chemical formula, CO(NH₂)₂. Hydrous copper sulphate is found in blue. It has the chemical formula, CuSO₄, 5H₂O. Lead sulphide is found in black. It is an inorganic compound and has the formula, PbS. Potassium permanganate is found in purple. It is an inorganic compound and has the chemical formula, KMnO4. Therefore, the correct option is (a).

27. The radius of a hydrogen atom is 10⁻¹⁰ m. Number of hydrogen atoms necessary to have a length of one nanometre is :

The next two (02) items are based on the following Table: No. of students studying in different standards of 6 different schools

StandardIIIIIIIVVVI
School
A425448585038
B506058454546
C404858464254
D455546405250
E485544555248
F515254426054

 

Correct Answer: (c) 5
Solution:According to the question,

Diameter of one hydrogen atom = 10⁻¹⁰ meter

So 1 meter is the diameter of (1/2 × 10⁻¹⁰) hydrogen atoms

So 10⁻⁹ meters will have the diameter of

= (1/2×10⁻¹⁰) × 10⁻⁹ = 5 atoms.

Therefore, the correct option is (c).

28. What is the average number of students studying in Standard I from all schools together?

Correct Answer: (d) 46
Solution:Total students in standard I

= 42 + 50 + 40 + 45 + 48 + 51 = 276

Required average = 276/6 = 46

29. What is the respective ratio of students studying in Standard III of schools A and B together to those studying in Standard VI of schools C and D together?

Correct Answer: (a) 53:52
Solution:Students studying in standard III of schools A and B

= 48 + 58 = 106

Students studying in standard VI of schools C and D together

= 54 + 50 = 104

Required ratio = 106/104 = 53:52

30. Match List-I with List-II and select the correct answer using the code given below the Lists:

List-I (Landform feature)List-II (Location)
A. Alluvial fans1. Mountainous Areas
B. 'V'-shaped valleys2. Coasts
C. Deltas3. Lower Reaches of the river
D. Ox-bow lakes4. Mountain Foothills

 

Code:ABCD
(a)4123
(b)4213
(c)3214
(d)3124
Correct Answer: (a)
Solution:Alluvial fans are located in the foothills of the mountain. It is a triangular deposit of gravel, sand, and even smaller pieces of sediment. V-shaped valleys are located in mountainous areas. They are very common in mountains and hills. Deltas are located in mountainous areas.

They are wetlands that form as rivers empty their water and sediment into another body of water. Oxbow lakes are located in the lower reaches of the river. They are small lakes located in an abandoned meander loop of a river channel. Therefore, the correct option is (a).