Q:

Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of :

A) An acetylenic triple bond	B) Two ethylenic double bonds
C) A vinyl group	D) An isopropyl group

Answer & Explanation Answer: C) A vinyl group

Explanation:

$C =} C H_{2} \overset{O z o n o l y s i s}{\to} H C H O$

Vinylic group.

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Filed Under: Chemistry
Exam Prep: AIEEE

3 5586

Q:

$[(84)^{2} \div 28 \times 12] \div 24 = 7 \times ?$

A) 15	B) 17
C) 19	D) None of these

Answer & Explanation Answer: D) None of these

Explanation:

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25 5585

Q:

Rifath Sharook has designed the world’s lightest satellite “KalamSat”. He hails from which country ?

A) Russia	B) Pakistan
C) Dubai	D) India

Answer & Explanation Answer: D) India

Explanation:

Indian teen Rifath Sharook from Tamil Nadu has designed the world’s lightest & smallest satellite named “KalamSat”. The satellite weighs only 64 grams and will be launched by NASA on June 21, 2017. With this, he will become the first Indian student to have his experiment launched by NASA. The main role of the satellite will be to demonstrate the performance of 3-D printed carbon fibre. The satellite has been designed in a way which will have a 240-minute mission in space and will operate for 12 minutes in a micro-gravity environment of space.

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11 5581

Q:

Washing soda is

A) sodium hydroxide	B) sodium carbonate
C) sodium bicorbonate	D) Potassium chloride

Answer & Explanation Answer: B) sodium carbonate

Explanation:

Sodium hydroxide - NaOH is caustic soda

Sodium carbonate - Na2CO3 is washing soda

Sodium bicarbonate - NaHCO3 is baking soda

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7 5580

Q:

Which of the following groups of rivers in india are likely to show the least erosional activity?

A) Himalayan rivers	B) Those rising in the Great Plain of India
C) The thin streams flowing into the Arabian Sea	D) The east-ward flowing peninsular rivers

Answer & Explanation Answer: D) The east-ward flowing peninsular rivers

Explanation:

The rivers are arranged in the descending order of their erosional activity.

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Filed Under: Indian Geography

9 5579

Q:

World Tobacco Day is celebrated on _____ ?

A) 30 May	B) 31 May
C) 1 June	D) 5 June

Answer & Explanation Answer: B) 31 May

Explanation:

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Filed Under: Important Days and Years

10 5579

Q:

A polygenic trait is controlled by 3 genes A, B and C. In a cross AaBbCc x AaBbCc, the phenotypic ratio of the offsprings was observed as 1 : 6 : m : 20 : m : 6 : 1. What is the value of m?

A) 10	B) 15
C) 18	D) 24

Answer & Explanation Answer: B) 15

Explanation:

Here crossing is AaBbCc x AaBbCc

As it is trihybrid cross,

we know, Number of zygotes formed = $4^{n}, where n = 3$

$4^{3} = 64$

Given ratio of offsprings = 1 : 6 : m : 20 : m : 6 : 1

Now, 1 + 6 + m + 20 + m + 6 + 1 = 64

34 + 2m = 64

2m = 30

=> m = 15.

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Filed Under: Biology
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2 5577

Q:

Which of the following is India’s first indigenously developed nuclear powered submarine ?

A) INS Arihant	B) INS Vikrant
C) INS Sindhurakshak	D) INS Trikhand

Answer & Explanation Answer: A) INS Arihant

Explanation:

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7 5575

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