GATE Questions and Answers with Explanation

Q:

Which of the following equations represents Photosynthesis?

A) 6CO2 + 6H2O -----> C6H12O6 + 6O2	B) C6H12O6 + 6O2 -----> CO2 + 6H2O
C) CO2 + H2O -----> C6H12O6 + 6O2	D) 6O2 + 6H2O -----> C6H12O6 + 6CO2

Answer & Explanation Answer: A) 6CO2 + 6H2O -----> C6H12O6 + 6O2

Explanation:

Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms activities.

Photosynthesis can be represented using a chemical equation.

The overall balanced equation is

$6 {CO}_{2} + 6 H_{2} O \overset{Sunlight}{\to} C_{6} H_{12} O_{6} + 6 O_{2} (S o u r c e o f C a r b o n & O x y g e n) + (S o u r c e o f E l e c t r o n s & H y d r o g e n) + E n e r g y t h a t d r i v e s P h o t o s y n t h e s i s - - - - > S u g a r + G a s p r o d u c e d b y s p l i t t i n g w a t e r .$

Where

CO2 = carbon dioxide

H2O = water

C6H12O6 = glucose

O2 = oxygen.

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Q:

In each question given below four conclusions are followed by statements. You have to take the three given statements to be true (even if they seem to be at variance from the commonly known facts). Read the conclusions and decide which of the following set of statement indicate that conclusion is logically follows.

Statements :
1. All chairs are tents.

2. No chairs is jugs.

3. No jugs is glasses.

4. No glasses is pots.

Conclusions :
I. All pots are tents.

II. All glasses are chair.

III. Some jugs are tents.

A) Only conclusion I follows	B) Both conclusion II & III follows
C) None follows	D) Only conclusion II follows

Answer & Explanation Answer: C) None follows

Explanation:

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Q:

Which of the following is a characteristic of all minerals?

A) Crystalline solids	B) Minerals are inorganic
C) All minerals are formed in a natural process	D) All the above

Answer & Explanation Answer: D) All the above

Explanation:

Common properties of Minerals are :

1. All minerals are formed in a natural process.

2. Minerals are inorganic

3. Minerals are crystalline solids.

4. Every mineral is an element or compound with a definite chemical composition.

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Q:

What is the freezing point of water in Celsius?

A) 0 deg C	B) 32 deg C
C) -42 deg C	D) -32 deg C

Answer & Explanation Answer: A) 0 deg C

Explanation:

The freezing point of water and melting point is 0 °C or 32 °F. The temperature may be lower if supercooling occurs.

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Q:

Obsession is to compulsion as cognition is to

A) behavior	B) emotion
C) Compulsion	D) None of the above

Answer & Explanation Answer: A) behavior

Explanation:

Obsession is to compulsion as cognition is to behavior.

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Q:

In a race of 200 m, A can beat B by 31 m and C by 18 m. In a race of 350 m, C will beat B by ?

A) 25 m	B) 21 m
C) 22 m	D) 19 m

Answer & Explanation Answer: A) 25 m

Explanation:

A:B = 200 : 169
A:C = 200 : 182
$\frac{C}{B} = \frac{C}{A} \times \frac{A}{B}$

$\frac{182}{200} \times \frac{200}{169}$

=> 182:169

When C covers 182 m , B Covers 169 m
When C covers 350 m , B Covers $\frac{169}{182} \times 350$
=> 325 m

So C beats B by (350 - 325) = 25 m.

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Q:

Wind and solar energy are examples of

A) Non renewable	B) Renewable
C) Unsustainable	D) Limited

Answer & Explanation Answer: B) Renewable

Explanation:

Many types of renewable energy resources such as wind and solar energy are constantly replenished and will never run out.

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Q:

Hard Drive capacity is measured in

A) Newton	B) GB
C) THz	D) Gwallior

Answer & Explanation Answer: B) GB

Explanation:

Hard drive or disc is used to store the users information and its capacity is measured in Giga Bytes (GB) and Tera Bytes (TB).

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