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GATE Questions

Q:

Which of the following reactions are exothermic?

 

1)   C + O2   CO22)  2Mg + O2   2MgO3)  CuSO4 + 5H2O   CuSO4.5H2O4)  All the above

A) 1 B) 2
C) 3 D) 4
 
Answer & Explanation Answer: D) 4

Explanation:

Here all the given options are Exothermic reactions. Exothermic reactions are those reactions which involves the release of heat.

 

Generally all the combining reactions are exothermic in nature.

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Q:

6, 3, 3, 6, 24, ?

Find the next number in the given number series?

A) 192 B) 186
C) 182 D) 194
 
Answer & Explanation Answer: A) 192

Explanation:

Given 

 

6   3   3   6   24   ?

 

Here

 

6

 

6 x 0.5 = 3

 

3 x 1 = 3 

 

3 x 2 = 6

 

6 x 4 = 24 

 

24 x 8 = 192

 

The next number in the given series is 192.

 

 

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Q:

what is the missing number in the sequence given below?

12  9  13.50  30.37  ?  341.71

A) 87.63 B) 91.12
C) 93.41 D) 97.94
 
Answer & Explanation Answer: B) 91.12

Explanation:

Given number series is 12  9  13.5  30.3  ?  341.7

Here the pattern followed by the series is

12 

12 x 0.75 = 9

9 x 1.5 = 13.5

13.5 x 2.25 = 30.3

30.37 x 3 = 91.12

91.12 x 3.75 = 341.71

 

Hence, the missing number in the sequence is 91.12.

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Q:

Which can not be formed using the letters of the given word ? 

CONCEPTUALIZATION 

A) Actual B) Petrol
C) Total D) Petal
 
Answer & Explanation Answer: B) Petrol

Explanation:
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Q:

Sort each description by the type of RNA it describes?

a) contains an anticodon
b) specifies the amino acid squence for a protein
c) contains exons
d) has amino acids covalently attached
e) is a component of ribosomes
f) is the most abundant form of RNA

A) a, b, d - tRNA, c - mRNA, e, f - rRNA B) a, c - tRNA, b, d - mRNA, e, f - rRNA
C) a, e, f - rRNA, b - mRNA, c, d - tRNA D) None of the above
 
Answer & Explanation Answer: A) a, b, d - tRNA, c - mRNA, e, f - rRNA

Explanation:

Option A) 

a, b, d - tRNA, c - mRNA, e, f - rRNA

 

Is the given sorted description that describes the RNA type.

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Q:

Solve the Logical Puzzle ?

22089055_1429224250518008_2132246368445954029_n1507282378.jpg image

A) 2 B) 4
C) 8 D) 0
 
Answer & Explanation Answer: B) 4

Explanation:
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Q:

Mg+O2=MgO

Balance the above Chemical equation?

A) 2Mg + O2 ----> 2MgO B) 2Mg + O ----> 2MgO
C) 2Mg + O ----> MgO2 D) 2Mg + O2 ----> MgO2
 
Answer & Explanation Answer: A) 2Mg + O2 ----> 2MgO

Explanation:

Given Equation is 

Mg + O2  MgO

Balancing the Chemical Equation is nothing but Conservation of Matter. As Matter is Neither created nor Destroyed, it must be conserved.

Here we have 1 Mg and 2 O on the left side and 1 Mg and 1 O on the right side

To balance that, add 1 Mg on the left side so that it becomes 2 Mg and 2 O on the left side

i.e,

2 Mg + O2  2 MgO

Here it has 2 Mg & 2 O on the left side and 2 Mg and 2 O on the right side and the Chemical equation is Balanced.

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Q:

Find the odd one out ?

Hawk ,  Parrot ,  Owl ,  Eagle

A) Eagle B) Owl
C) Parrot D) Hawk
 
Answer & Explanation Answer: C) Parrot

Explanation:

All except Parrot are birds of prey.

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