Q:

The ratio of gross cropped area to the net sown area is called

A) cropping intensity B) intensity of crop rotation
C) crop productivity D) cropping diversity
 
Answer & Explanation Answer: A) cropping intensity

Explanation:
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2 2012
Q:

In  which  one  of  the  following  States  is Loktak Lake situated?

A) Sikkim B) Himachal Pradesh
C) Manipur D) Meghalaya
 
Answer & Explanation Answer: C) Manipur

Explanation:

Loktak Lake:the largest freshwater  (sweet)  lake  in  North -East  India,  also  called  the  only Floating  lake  in  the  world  due to the floating phumdis (heterogeneous mass of vegetation,    soil,    and    organic matters    at    various    stages    of decomposition)   on   it,   is   located near   Moirang   in   Manipur   state, India.  The  etymology  of  Loktak  is Lok  =  "stream"  and  tak  =  "the end"

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0 779
Q:

Which one of the following statements is correct?For the purpose of Census 2011

A) a person aged seven and above who can both read and write with understanding in any language is treated as a literate B) a person aged eightand abovewho can both read and write with understanding in any language is treated as a literate
C) a person aged nine and above who can both read and write with understanding in any language is treated as a literate D) a person aged ten and above who can bothread and write with understanding in any language is treated as a literate.
 
Answer & Explanation Answer: A) a person aged seven and above who can both read and write with understanding in any language is treated as a literate

Explanation:
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1 667
Q:

What  is  the  number  of  atoms  in  46  g  of sodium-23 (N = Avogadro constant)?

A) N/2 B) N
C) 2N D) 23 N
 
Answer & Explanation Answer: C) 2N

Explanation:
Number of atoms in 46 grams of sodium - 23 will be 2N.
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1 953
Q:

‘Plum  Pudding  Model’  for  an  atom  was proposed by

A) Antoine Lavoisier B) Robert Boyle
C) Ernest Rutherford D) J. J. Thomson
 
Answer & Explanation Answer: D) J. J. Thomson

Explanation:

The   first   model   of   atom   was proposed   by   J.   J.   Thomson   in 1898.According  to  this  model,  the positive   charge   of   the   atom   is uniformly   distributed   throughout the  volume  of  the  atom  and  the negatively  charged  electrons  are embedded  in  it  like  seeds  in  a watermelon.    This    model    was picturesquely  called  plum  pudding model of the atom

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0 928
Q:

There are two elements-calcium (atomic number 20) and argon (atomic number 18). The mass number of both the elements is 40. They are therefore known as

A) isotones B) isochores
C) isobars D) isotopes
 
Answer & Explanation Answer: C) isobars

Explanation:

Isotopes-These  are  atoms  of  the elements  having  the  same  atomic number but different mass number.,  Isobars-These  are atoms of same mass number but different atomic  number.,  Isotones-These are  atoms  of  different  elements having same number of neutrons.

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1 1012
Q:

Which one of the following is the most characteristic property of an element?

 

A) Density B) Boiling point
C) Mass number D) Atomic number
 
Answer & Explanation Answer: D) Atomic number

Explanation:

Atomic  number  is  the  fundamental properties  of  an  element.  Every atom  is  identified  by  its  unique atomic  number.  Atomic  number  is equal  to  the  number  of  protons present in an atom of the element.

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0 9928
Q:

The pH value of a sample of multiple-distilled water is

A) zero B) 14
C) very near to zero D) very near to seven
 
Answer & Explanation Answer: D) very near to seven

Explanation:

Water  is  neutral  and  has  a  pH value  of  7  and  because  here it  is multiple distilled water, it would be very near to seven

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3 1828