Q:

Washing soda is used ______.

I. for removing permanent hardness of water

II. for disinfecting drinking water

III. as a cleaning agent for domestic purpose

A) Only I and II	B) Only I and III
C) Only II and III	D) All I, II and III

Answer & Explanation Answer: B) Only I and III

Explanation:

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Filed Under: Chemistry
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Q:

Parenthesis is never required in Postfix or Prefix expressions

A) TRUE

B) FALSE

Answer & Explanation Answer: A) TRUE

Explanation:

Parenthesis is not required because the order of the operators in the postfix /prefix expressions determines the actual order of operations in evaluating the expression

Workspace

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Subject: Database
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3 9152

Q:

In a face centred cubic lattice, atom A occupies the corner positions and atom B occupies the face centre positions. If one atom of B is missing from one of the face centred points, the formula of the compound is

1) $A_{2} B_{5}$

2) $A_{3} B_{2}$

3) $A_{2} B_{3}$

4) $A_{3} B_{4}$

A) Option 1	B) Option 2
C) Option 3	D) Option 4

Answer & Explanation Answer: A) Option 1

Explanation:

$Z_{A} = \frac{8}{8}$ ; $Z_{B} = \frac{5}{2}$

So formula of compound is $A B_{\frac{5}{2}}$

i.e., $A_{2} B_{5}$ .

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Q:

Which is the point from where an azimuth originates?

A) South	B) North
C) East	D) West

Answer & Explanation Answer: B) North

Explanation:

The azimuth originates at true North i.e, the azimuth originates from the north point. It is a measure of how far an object forms the observer's north point.

Azimuth is a technical mapping term which is used to describe the direction of an angle between north and south on a compass circle through which the circle line passes. It is the most common military method to express direction. When using an azimuth, the point from which the azimuth originates is the center of an imaginary circle.

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8 9148

Q:

Match the correct Memory units.

A) a-r, b-p, c-s, d-q	B) a-p,b-s, c-q, d-r
C) a-r, b-s, c-q, d-p	D) a-r, b-q, c-s, d-p

Answer & Explanation Answer: A) a-r, b-p, c-s, d-q

Explanation:

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Filed Under: Computer
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6 9144

Q:

Orlon is a polymer of

A) Dacron	B) Acrylonitrile
C) Polyamide Nylon	D) None of the above

Answer & Explanation Answer: B) Acrylonitrile

Explanation:

The monomeric unit of orlon polymer is Acrylonitrile. Orlon is also known as Polyacrylonitrile (PAN).

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Q:

Battle of Gulnabad was led by Mahmud Hotaki and fought in the year ___.

A) 1770	B) 1722
C) 1712	D) 1702

Answer & Explanation Answer: B) 1722

Explanation:

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Q:

Guess the Missing number in the Number Challenge ?

A) 8	B) 32
C) 44	D) 64

Answer & Explanation Answer: D) 64

Explanation:

The logic in the challenge is

$\sqrt{81} x 6 = 9 x 6 = 54$

$\sqrt{144} x 7 = 84$

Similarly, $\sqrt{64} x 8 = 8 x 8 = 64$ .

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