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Q:

Which of the following statements are CORRECT?

 

I. Ethanol is a good solvent for organic compounds.

II. Boiling and melting points of ethanol are low with respect to water.

III. Ethanol is used tincture iodine

 

A) Only I and II B) Only I and III
C) Only II and III D) All I, II and III
 
Answer & Explanation Answer: D) All I, II and III

Explanation:
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Filed Under: Chemistry
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1 43892
Q:

Find the similarity in the following :

 

Carbon, Silicon, Boron, Arsenic

 

A) All of them are gases B) All of them are non-metals
C) All of them are metals D) No similarity
 
Answer & Explanation Answer: B) All of them are non-metals

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Filed Under: Chemistry
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Q:

Which  of  the  following  statements  about Bitcoin is/are correct?

1.It is a decentralized virtual currency.

2.It    is    generated    through    complex computer software systems.

3.The  Reserve  Bank  of  India  recognized it as a legal tender in January 2016.

Select  the  correct  answer  using  the  code given below.

A) 1 only B) 1 and 2 only
C) 2 and 3 only D) 1, 2 and 3
 
Answer & Explanation Answer: B) 1 and 2 only

Explanation:

Bitcoin is the world's first cryptocurrency,    a    form    of electronic   cash.It   is   the    first decentralized digital  currency:  the system   was   designed   to   work without   acentral   bankor   single administrator.Bitcoins    are    sent from  user  to  user  on  the peer-to-peer bitcoin network directly, without the need for intermediaries.  These  transactions are verified by network nodes through cryptography and recorded in a public distributed ledger called a block chain. Bitcoin was invented by an unknown person or group of people   using   the   name Satoshi Nakamoto. Bitcoins are not recognised  as  a  legal  tender  by Reserve Bank of India. 

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Filed Under: Indian Economy
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Q:

The name of the first bank established in India was

 

A) Bank of Hindustan B) Reserve Bank of Indian
C) Imperial Bank D) State Bank of India
 
Answer & Explanation Answer: C) Imperial Bank

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Filed Under: Inventions
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211 43757
Q:

Generally covalently bonded molecules ______.

 

I. have high boiling and melting point as compare to ionically bonded molecules

II. poor conductors of electricity

III. have weak intermolecular force

 

A) Only I and II B) Only I and III
C) Only II and III D) All I, II and III
 
Answer & Explanation Answer: C) Only II and III

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Filed Under: Chemistry
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1 43741
Q:

Which  of  the  following  substances  cause temporary hardness in water?

1. Mg(HCO3)2

2. Ca(HCO3)2

3. CaCl2

4. MgSO4

A) 3 and 4 B) 2and 3
C) 1 and 4 D) 1 and 2
 
Answer & Explanation Answer: D) 1 and 2

Explanation:

There are two types of water hardness: temporary and permanent hardness. Temporary hardness is due to the presence of calcium hydrogen carbonate Ca(HCO3)2(aq) and magnesium hydrogen carbonate Mg(HCO3)2(aq).

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Filed Under: Chemistry
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Q:

Primary growth in plants occurs by

A. Vertical meristem

B. Lateral meristem

C. Intercalary meristem

D. Apical meristem

 

A) C & D B) A, B & D
C) A, B, C & D D) B, C & D
 
Answer & Explanation Answer: A) C & D

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Filed Under: Biology
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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

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Filed Under: Indian History
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1 43688