4000+ Latest Bank Exams Questions and Answers with Explanation

Q:

P, Q and R start simultaneously from A to B. P reaches B, turns back and meet Q at a distance of 11 km from B. Q reached B, turns back and meet R at a distance of 9 km from B. If the ratio of the speeds of P and R is 3:2, what is the distance between A and B ?

A) 99	B) 100
C) 89	D) 1

Answer & Explanation Answer: A) 99

Explanation:

Let, Distance between A and B = d

Distance travelled by P while it meets Q = d + 11

Distance travelled by Q while it meets P = d – 11

Distance travelled by Q while it meets R = d + 9

Distance travelled by R while it meets Q = d – 9

Here the ratio of speeds of P & Q => SP : SQ = d + 11 : d – 11

The ratio of speeds of Q & R => SQ : SR = d + 9 : d – 9

But given Ratio of speeds of P & R => P : R = 3 : 2

$\frac{S P}{S R} = \frac{S P}{S Q} x \frac{S Q}{S R} = \frac{(d + 11) (d + 9)}{(d - 11) (d - 9)}$

=> $\frac{(d + 11) (d + 9)}{(d - 11) (d - 9)}$ = 3/2

=> d = 1, 99

=> d = 99 satisfies.

Therefore, Distance between A and B = 99

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Q:

The oxidation number of Cr in $K_{2} {Cr}_{2} O_{7}$ is

A) +6	B) -5
C) +3	D) -4

Answer & Explanation Answer: A) +6

Explanation:

We will rewrite the formula as an equation.

2K + 2Cr + 7O = 0

The zero comes from there being no overall charge on the compound.

Each oxidation number is represented by the element's symbol.

Since this compound is not a peroxide or superoxide, the oxidation value for O is -2

K being in group 1 has a +1 charge and therefore has an oxidation number of K is +1

Now, by putting known values in we have:

2(+1) + 2(Cr) + 7(-2) = 0

2 + 2Cr -14 = 0

2Cr = +12

Cr = +6.

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Filed Under: Chemistry
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13 6454

Q:

Which of these illustrates the Secondary Structure of a Protein?

chemistry1519110232.jpg image

A) A	B) B
C) C	D) D

Answer & Explanation Answer: B) B

Explanation:

The Secondary Structure of a Protein is option B)

The Secondary Structure of a Protein results from Hydrogen Bonds.

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Filed Under: Chemistry
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2 6449

Q:

If + means x, - means /, x means + and / means -; compute the value of the expression

36 - 4 + 7 x 8

A) 72	B) 71
C) 74	D) 75

Answer & Explanation Answer: B) 71

Explanation:

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Filed Under: Coding and Decoding
Exam Prep: Bank Exams

1 6449

Q:

Rearrange the parts of the sentence in correct order

Taken together, this

P-gives a total global
Q-stockpile of almost 1,900 tons of
R-nuclear weaponsusable material

A) QRP	B) PQR
C) RPQ	D) QPR

Answer & Explanation Answer: B) PQR

Explanation:

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Filed Under: English
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1 6442

Q:

In a mixture of three varities of oils , the ratio of their weight is 4 : 5 : 8. If 5 kg of oils of the first variety, 10 kg of the second variety and some quantity of oils of the third variety are added to the mixture, the ratio of the weights of three varieties of oils becomes as 5 : 7 : 9 in the final mixture, find the quantity of third variety of oil was ?

A) 15 kg	B) 25 kg
C) 35 kg	D) 45 kg

Answer & Explanation Answer: D) 45 kg

Explanation:

Let the ratio of initial quantity of oils be 'x' => 4x, 5x & 8x.
Let k be the quantity of third variety of oil in the final mixture.
Let the ratio of initial quantity of oils be 'y'
From given details,
4x + 5 = 5y ..... (1)
5x + 10 = 7y .....(2)
8x + k = 9y ......(3)

By solving (1) & (2), we get
x = 5 & y = 5

From (3) => k = 5

Therefore, quantity of third variety of oil was 9y = 9(5) = 45kg.

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Filed Under: Average
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Q:

Which of the following crop is known as Green Gold?

A) Coffee	B) Neem
C) Tea	D) Rice

Answer & Explanation Answer: C) Tea

Explanation:

Tea crop is known as Green Gold.

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Filed Under: General Science
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11 6440

Q:

Choose the word that best defines the given phrases:-

To talk through one’s hat

A) To speak fluently	B) To talk nonsense
C) To talk wisdom	D) To speak at random

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