Q:

Which compound contains both ionic and covalent bonds?

A) NaNO3	B) CaSO4
C) NH4Cl	D) All of the above

Answer & Explanation Answer: D) All of the above

Explanation:

Here all the given compounds have both ionic and covalent bonds.

NaNO3 - In Sodium nitrate, Nitrate is covalently bonded as nitrogen is bonded with 3 oxygen atoms. And this nitrate is ionically bonded with sodium.

CaSO4 - In Calcium sulphate, sulphate is covalently bonded as sulphur is bonded with 4 oxygen atoms. And this sulphate is ionically bonded with calcium.

NH4Cl - In Ammonium chloride, ammonium is covalently bonded as nitrogen is bonded with 4 hydrogen atoms. And this ammonium is ionically bonded with chlorine.

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Q:

The lotus temple in Delhi is a house of worship of which of the following religions ?

A) Buddhism	B) Baha'i Religion
C) Zoroastrian	D) Islam

Answer & Explanation Answer: B) Baha'i Religion

Explanation:

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Filed Under: Indian History

34 8377

Q:

The planet with the maximum number of natural satellites (moons), so far discovered is

A) Jupiter	B) Neptune
C) Saturn	D) Uranus

Answer & Explanation Answer: A) Jupiter

Explanation:

Jupiter 63

Saturn 60

Uranus 27

Neptune 13

Pluto 3

Mars 2

Earth 1

Venus 0

Mercury 0

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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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Q:

The rank of the different Ministers in the Union Council of Ministers is determined by the

A) President	B) Prime Minister
C) Cabinet Secretary	D) Speaker of the Lok Sabha

Answer & Explanation Answer: B) Prime Minister

Explanation:

The rank of the different ministers is determined by the Prime Minister, according to whose advice the President appoints the Ministers [ Art 75(1) ] and also allocates business among them [ Art 77 ].

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Q:

Kilohertz is a unit which measures

A) Electromagnetic radio wave frequencies	B) Electric resistance
C) Power used by a current of one ampere	D) Voltage

Answer & Explanation Answer: A) Electromagnetic radio wave frequencies

Explanation:

The hertz (Hz) is defined as one cycle per second and is a SI unit of frequency. Here kilohertz is also a unit of frequency of waves and is defined as 1000 cycles per second. Radio waves are measured in kilohertz (KHz).

Kilohertz_is_a_unit_which_measures1561453991.jpg image

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Q:

In which country Aztec civilization was originated ?

A) Greece	B) USA
C) Mexico	D) Egypt

Answer & Explanation Answer: C) Mexico

Explanation:

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Filed Under: World History

25 8361

Q:

A place where government records are kept

A) Coffer	B) Pantry
C) Archives	D) Scullery

Answer & Explanation Answer: C) Archives

Explanation:

A place where government records are kept are called Archives.

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