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Multiple choice chemistry chemistry of non-metals oxides of elements simple oxides oxygen

The metals which can produce amphoteric oxides are:

  1. sodium and aluminium

  2. zinc and potassium

  3. calcium and sodium

  4. aluminium and zinc
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

'$Al$' and '$Zn$' reacts with both acids and bases. So, these are amphoteric in nature. So, oxides of these elements are amphoteric oxides. 

Multiple choice chemistry chemistry of non-metals oxides of elements simple oxides oxygen

Out of the following oxides, the amphoteric oxide is:

  1. $Fe _2O _3$
  2. $Al _2O _3$
  3. $P _2O _5$
  4. $N _2O$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Aluminium reacts with acids and bases. So, it is amphoteric in nature. The oxide of an amphoteric element is called amphoteric oxide. So, $Al _{2}O _{3} $ is an amphoteric oxide.

Multiple choice chemistry chemistry of non-metals oxides of elements simple oxides oxygen

Pick the group which does not contain a neutral oxide.

  1. $NO _2, P _4O _{10}, Al _2O _3, NO$
  2. $MgO, N _2O _5, SO _3, N _2O$
  3. $CO _2, SO _3, CaO, XeO _3$
  4. $CO, SiO _2, SnO _2, Na _2O _3$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Neutral oxide are those which do not react with acids as well as bases such as $NO,{ N } _{ 2 }O,CO,{ O } _{ 2 }{ F } _{ 2 }$.

So only option $C$ does not contain neutral oxide.

Multiple choice chemistry chemistry of non-metals oxides of elements simple oxides oxygen

In view of the signs of $\Delta _{r}G^{0}$ for the following reactions :
$PbO _{2} +Pb \rightarrow 2PbO, \Delta _ {r}..G..^{0},0$
$SnO _{2} +Sn \rightarrow 2SnO, \Delta _ {r}..G..^{0},0$

  1. For lead +2, for tin +2

  2. For lead +4, for tin +4

  3. For lead +2, for tin +4

  4. For lead +4, for tin +2
Reveal answer Fill a bubble to check yourself
C Correct answer
Multiple choice chemistry chemistry of non-metals oxides of elements simple oxides oxygen

Among the following which one has more acidic character?

  1. $B _{2}O _{3}$
  2. $CO _{2}$
  3. $N _{2}O _{3}$

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

$B _2O _3$ is more acidic than $CO _2$ and $N _2O _5$ because oxides of elements of 13th group of modern periodic table is more acidic than than 14th and 15th group elements.

Multiple choice chemistry environment environmental impact: global warming green house effect geobiochemical cycle

The purest form of water that is considered to be ________.

  1. tap water

  2. water from wells

  3. bore water

  4. rain water
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Rain water is considered the purest form of water. 

Impurities and salts present in water on earth are left behind during vapourization by the sun. 

These minerals and micro-organisms are present in ground water resources such as tap, well, bore.

herefore, option D is correct.