Q:

Which one of the following orders presents the correct sequence of the increasing basic nature of the given oxides?

(1) $K_{2} O < N a_{2} O < A l_{2} O_{3} < M g O$

(2) $A l_{2} O_{3} < M g O < N a_{2} O < K_{2} O$

(3) $M g O < K_{2} O < A l_{2} O_{3} < N a_{2} O$

(4) $N a_{2} O < K_{2} O < M g O < A l_{2} O_{3}$

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

Answer & Explanation Answer: B) Option 2

Explanation:

While moving from left to right in periodic table basic character of oxide of elements will decrease.

$∴ \to_{I n c r e a \sin g b a s i c s t r e n g t h}^{A l_{2} O_{3} < M g O < N a_{2} O}$

and while descending in the group basic character of corresponding oxides increases.

$∴ \to_{I n c r e a \sin g b a s i c s t r e n g t h}^{N a_{2} O < K_{2} O}$

$∴ C o r r e c t O r d e r i s A l_{2} O_{3} < M g O < N a_{2} O < K_{2} O$

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Filed Under: Chemistry
Exam Prep: AIEEE

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Q:

Which of the following is the name Pierre Cardin associated with?

A) Painting	B) Sports
C) Fashion Designing	D) Music

Answer & Explanation Answer: C) Fashion Designing

Explanation:

It belongs to the field of Fashion Designing

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Filed Under: Indian Culture

73 5066

Q:

Which of the following is not an aerosol?

A) mud	B) dust
C) smoke	D) fog

Answer & Explanation Answer: A) mud

Explanation:

Among the given options, mud is not an aerosol.

An aerosol is a suspension of fine solid particles or liquid droplets, in the air or another gas. Aerosols can be natural or anthropogenic. Examples of natural aerosols are fog, dust, forest exudates and geyser steam. Examples of anthropogenic aerosols are haze, particulate air pollutants, and smoke.

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Filed Under: Physics
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5 5066

Q:

Speed of sound is maximum in which among the following?

A) Gases	B) Vaccum
C) Liquids	D) Solids

Answer & Explanation Answer: D) Solids

Explanation:

We know that, in solids all the particles are packed together and hence sound can travel from one to one very fast.

Hence, speed of sound is maximum in solids and decreses from solids to liquids and liquids to gases. Sound can't travel through vaccum.

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2 5065

Q:

Which state government has launched 'People First' mobile application for grievance redressal ?

A) Uttar Pradesh	B) Maharashtra
C) Gujarat	D) Andhra Pradesh

Answer & Explanation Answer: D) Andhra Pradesh

Explanation:

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Filed Under: Indian Politics
Exam Prep: Bank Exams , CAT
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15 5063

Q:

Who has been selected for the 2016 National Geoscience Award in the field of geo-environmental studies?

A) Keshav Krishna	B) Ashok Kumar Singhvi
C) P.V. Joseph	D) Vishnu Deo Sai

Answer & Explanation Answer: A) Keshav Krishna

Explanation:

Dr. A Keshav Krishna, a scientist at the National Geophysical Research Institute (NGRI), has been selected for 2016 National Geoscience Award by the Ministry of Mines in the field of Geo-environmental studies in applied geosciences.

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Filed Under: Honours and Awards

7 5062

Q:

Find the logic and solve this mathematical puzzle?

solve_this_maths_puzzle1565956551.jpg image

A) 112	B) 72
C) 127	D) 144

Answer & Explanation Answer: D) 144

Explanation:

In the given puzzle, the logic is

2 + 3 = 10 => (2 + 3) * 2 = 10

6 + 3 = 54 => (6 + 3) * 6 = 54

8 + 3 = 88 => (8 + 3) * 8 = 88

Similarly,

9 + 7 => (9 + 7) * 9 = 16 x 9 = 144.

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Filed Under: Math Puzzles
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Q:

Who among the following was a Brahmavadini who composed some hymns of the Vedas?

A) Gargi	B) Lopamudra
C) Savitri	D) Leelavati

Answer & Explanation Answer: B) Lopamudra

Explanation:

Lopamudra was a Brahmavadini who composed some hymns of the Vedas.

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Filed Under: Indian History
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