Q:

Which media have the ability to have data/information stored (written) on them by users more than once?

A) CD-R disks	B) CD-RW disks
C) Zip disks	D) Optical disks

Answer & Explanation Answer: B) CD-RW disks

Explanation:

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Q:

What does one mole of H2O correspond to

A) 16 gms	B) 18 gms
C) 20 gms	D) 22 gms

Answer & Explanation Answer: B) 18 gms

Explanation:

The molar mass of H2O can be calculated as the following.

M(H2O)= [2 x M(H)] + [M(O)].

And we know that M(H) = 1g/mol, M(O) = 16g/mol.

So, M(H2O)= 2x1 + 16 = 18g/mol,

That means 1 mole of H2O contains 18g.

Hence, one mole of H2O corresponds to 18 grams.

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Q:

What is the name of Sweden's Parliament ?

A) Storting	B) Knesset
C) Riksdag	D) Sejm

Answer & Explanation Answer: C) Riksdag

Explanation:

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Q:

Can you solve this maths puzzle?

A) 10	B) 12
C) 14	D) 18

Answer & Explanation Answer: B) 12

Explanation:

The logic in this puzzle is summing the result of [subtraction of upper two digits] & [addition of lower two digits]

Hence, the result is

(5 - 3) + (2 + 8) = 2 + 10 = 12.

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Q:

Humayun Nama was written during the reign of Emperor Akbar's reign, both Hindi and persian,belongs to

A) Gulbadan Begum	B) Ahmad Yadgar
C) Abbas Sarwani	D) Faizi Sarhindi

Answer & Explanation Answer: A) Gulbadan Begum

Explanation:

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Q:

Seawater (i.e. saltwater) freezes at:

A) at a slightly higher temperature than fresh water	B) at a slightly lower temperature than fresh water.
C) the same temperature as fresh water.	D) seawater does not freeze.

Answer & Explanation Answer: B) at a slightly lower temperature than fresh water.

Explanation:

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Q:

What is the currency of Indonesia?

A) rupiah	B) dinar
C) rangit	D) riyal

Answer & Explanation Answer: A) rupiah

Explanation:

Currency of Indonesia is rupiah

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Q:

The degree of dissociation ( $α$ ) of a weak electrolyte, $A_{x} B_{y}$ is related to van't Hoff factor (i) by the expression:

$1 . α = \frac{x + y + 1}{i - 1}$

$2 . α = \frac{x + y - 1}{i - 1}$

$3 . α = \frac{i - 1}{x + y + 1}$

$4 . α = \frac{i - 1}{x + y - 1}$

A) 1 is correct	B) 2 is correct
C) 3 is correct	D) 4 is correct

Answer & Explanation Answer: D) 4 is correct

Explanation:

Van't Hoff factor (i) = $\frac{O b s e r v e d C o l l i g a t i v e P r o p e r t y}{N o r m a l C o l l i g a t i v e P r o p e r t y}$

$\begin{matrix} A_{x} B_{y} \\ 1 - α \end{matrix} \to \begin{matrix} x A^{+ y} \\ x α \end{matrix} + \begin{matrix} y B^{- x} \\ y α \end{matrix}$

Total Moles = $1 - α + x α + y α$ = $1 - α (x + y - 1)$

$i = \frac{1 + α (x + y - 1)}{1}$

$\Rightarrow α = \frac{i - 1}{x + y - 1}$

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