GATE Questions

Q:

What is the gram formula mass of K2CO3?

A) 147 B) 138
C) 129 D) 116
 
Answer & Explanation Answer: B) 138

Explanation:

The gram formula mass of a compound is nothing but the molar mass.

The molar mass of K2CO3 (Potassium Carbonate) is given by

Atomic weights of individual elements are

 

K (Potassium) = 39 g

C (Carbon) = 12 g

O (Oxygen) = 16 g

 

Hence, that of K2CO3 = 39(2) + 12 + 16(3)

= 78 + 12 + 48

= 138.

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Q:

What element is found in all organic compounds?

A) Hydrogen B) Calcium
C) Nitrogen D) Carbon
 
Answer & Explanation Answer: D) Carbon

Explanation:

Carbon is found in all organic compounds.

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Q:

In which of the following organelles does photosynthesis take place?

A) Miochondria B) Chloroplast
C) Central Vacuole D) Ribosome
 
Answer & Explanation Answer: B) Chloroplast

Explanation:

Chloroplasts use energy from light to transform carbon dioxide and water into sugar and oxygen.

A green pigment located in membranes within the chloroplasts of plants and algae and in the membranes of certain prokaryotes.

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Q:

The act of formally approving something is known as Arbitration.

A) TRUE B) FALSE
Answer & Explanation Answer: B) FALSE

Explanation:

The act of formally approving something is known as Ratification.

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Q:

K men agree to donate a gift of Rs. L to trust. If three men drop out how much more will each have to contribute towards the purchase of the gift ?

A) L / (k-3) B) k / (L-3)
C) 2K / 3L-K D) 3L / K(K-3)
 
Answer & Explanation Answer: D) 3L / K(K-3)

Explanation:

Intial contribution = L/K
After 3 men drop, then contribution =L/K-3
The amount more to pay in contribution = LK-3 - LK

 

3LK(K-3)

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Q:

Find which of the two conclusions I and II given below is/are definitely true from the the given statements.

 

Statements: I > W > T > N, I = F = G = C

 

Conclusions:    I. W > I                 

                         II. C > N

A) Only Conclusion I is true B) Only Conclusion II is true
C) Both conclusions I & II are true D) Neither conclusion I nor II is true
 
Answer & Explanation Answer: B) Only Conclusion II is true

Explanation:

From the given Statements : 

 1. I > W > T > N
 
 2. F = G = C
 

Conclusions are : 

 I. W > I (False)

 II. C > N (True)

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Q:

Study of Rocks is called

A) Geology B) Cytology
C) Petrology D) Petology
 
Answer & Explanation Answer: C) Petrology

Explanation:

The scientific study of rocks is called petrology, which is an essential component of geology.

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Q:

What type of lens is a magnifying glass?

A) Diverging B) Spherical
C) Converging D) Achromatic
 
Answer & Explanation Answer: C) Converging

Explanation:

A magnifying glass is a convex lens that is used to produce a magnified image of an object. It is also called a hand lens in laboratory contexts.

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