Recent questions in 2015

The following reaction is known by the name -

asked Aug 21, 2018 by pady_1

1 answer

Two possible stero-structuers of $CH_3CHOH.COOH$, which are optically active, are called :

asked Aug 21, 2018 by pady_1

1 answer

The stability of +1 oxidation state among Al, Ga, In and Tl in creases in the sequence -

asked Aug 21, 2018 by pady_1

1 answer

The correct statement regarding defects in crystalline solids is

asked Aug 21, 2018 by pady_1

1 answer

What is the mole fraction of the solute in a 1.00 m aqueous solution ?

asked Aug 21, 2018 by pady_1

0 answers

20.0 g of magnesium carbonate sample decomposes on hating to give carbon dioxide and 8.0 g magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample ?

asked Aug 21, 2018 by pady_1

1 answer

The heat of combustion of carbon to $CO_2$ is $–393.5\; kJ/mol$. The heat released upon formation of $35.2 \;g$ of $CO_2$ from carbon and oxygen gas is -

asked Aug 21, 2018 by pady_1

1 answer

Hybridization involved in complex the $[Ni(CN)_4]^{2–}$ is : (At. No. Ni = 28)

asked Aug 21, 2018 by pady_1

1 answer

A gas such as carbon monoxide would be most likely to obey the ideal gas law at :

asked Aug 21, 2018 by pady_1

1 answer

Which of the following statements is not correct for a nucleophile?

asked Aug 21, 2018 by pady_1

1 answer

If Avogadro number NA, is changed from $6.022 \times 10^{23} mol^{–1}$ to $6.022 \times 10^{20} \;mol^{–1}$, this would change :

asked Aug 21, 2018 by pady_1

1 answer

The name of complex ion, $[Fe(CN)_6]^{3–}$ is :

asked Aug 21, 2018 by pady_1

1 answer

Which of the statements given below is incorrect ?

asked Aug 21, 2018 by pady_1

0 answers

The vacant space in bcc lattice unit cell is :

asked Aug 21, 2018 by pady_1

1 answer

Reaction of phenol with chloroform in presence of dilute sodium hydroxide finally introduces which one of the following functional group ?

asked Aug 21, 2018 by pady_1

1 answer

Assuming complete ionization, same moles of which of the following compounds will require the least amount of acidified $KMnO_4$ for complete oxidation?

asked Aug 21, 2018 by pady_1

2 answers

In the reaction with HCl, an alkene reacts in accordance with the Markovnikov's rule, to give a product 1-chloro-1- methylcyclohexane. The possible alkene is :

asked Aug 21, 2018 by pady_1

1 answer

In which of the following pairs, both the species are not isostructural ?

asked Aug 21, 2018 by pady_1

1 answer

The number of water molecules is maximum in :

asked Aug 21, 2018 by pady_1

1 answer

Decreasing order of stability of $O_2, O_2^-, O_2^+$ and $O_2^{2-}$ is :

asked Aug 21, 2018 by pady_1

1 answer

Strong reducing behaviour of $H_3PO_2$ is due to :

asked Aug 21, 2018 by pady_1

1 answer

On heating which of the following releases $CO_2$ most easily ?

asked Aug 21, 2018 by pady_1

1 answer

Caprolactam is used for the manufacuture of :

asked Aug 21, 2018 by pady_1

1 answer

Aqueous solution of which of the following compounds is the best conductor of electric current ?

asked Aug 21, 2018 by pady_1

1 answer

Which one of the following pairs of solution is not an acidic buffer ?

asked Aug 21, 2018 by pady_1

1 answer

If the equilibrium constant for $N_2 (g) + O_2(g) \leftrightharpoons 2NO (g) $ is $K$, the equilibrium constant for $\frac{1}{2} N_2(g) + \frac{1}{2}O_2 (g) \leftrightharpoons NO (g) $ will be :

asked Aug 21, 2018 by pady_1

1 answer

The number of structural isomers possible from the molecular formula $C_3H_9N$ is

asked Aug 21, 2018 by pady_1

1 answer

The formation of the oxide ion, $O^{2–}$ (g), from oxygen atom requires first an exothermic and then an endothermic step as shown below : $O(g) + e^- \to O^- (g), \Delta_f H^{\ominus} = -141 kJ\;mol^{-1}$ $O^-(g) + e^- \to O^{2-} (g), \Delta_f H^{\ominus} = +780 kJ\;mol^{-1}$ Thus process of formation of $O^{2–}$ in gas phase is unfavourable even though $O^{2–}$ is isoelectronic with neon. It is due to the fact that :

asked Aug 21, 2018 by pady_1

1 answer

Gadolinium belongs to 4f series. It's atomic number is 64. Which of the following is the correct electronic configuration of gadolinium?

asked Aug 21, 2018 by pady_1

1 answer

2,3-Dimethyl-2-butene can be prepared by heating which of the following compounds with a strong acid?

asked Aug 21, 2018 by pady_1

1 answer

Ask Questions, Get Answers

The following reaction <br> <br> is known by the name -

Two possible stero-structuers of $CH_3CHOH.COOH$, which are optically active, are called :

The stability of +1 oxidation state among Al, Ga, In and Tl in creases in the sequence -

The correct statement regarding defects in crystalline solids is

What is the mole fraction of the solute in a 1.00 m aqueous solution ?

20.0 g of magnesium carbonate sample decomposes on hating to give carbon dioxide and 8.0 g magnesium oxide. What will be the percentage purity of magnesium carbonate in the sample ?

The heat of combustion of carbon to $CO_2$ is $–393.5\; kJ/mol$. The heat released upon formation of $35.2 \;g$ of $CO_2$ from carbon and oxygen gas is -

Hybridization involved in complex the $[Ni(CN)_4]^{2–}$ is : (At. No. Ni = 28)

A gas such as carbon monoxide would be most likely to obey the ideal gas law at :

Which of the following statements is not correct for a nucleophile?

If Avogadro number NA, is changed from $6.022 \times 10^{23} mol^{–1}$ to $6.022 \times 10^{20} \;mol^{–1}$, this would change :

The name of complex ion, $[Fe(CN)_6]^{3–}$ is :

Which of the statements given below is incorrect ?

The vacant space in bcc lattice unit cell is :

Reaction of phenol with chloroform in presence of dilute sodium hydroxide finally introduces which one of the following functional group ?

Assuming complete ionization, same moles of which of the following compounds will require the least amount of acidified $KMnO_4$ for complete oxidation?

In the reaction with HCl, an alkene reacts in accordance with the Markovnikov's rule, to give a product 1-chloro-1- methylcyclohexane. The possible alkene is :

In which of the following pairs, both the species are not isostructural ?

The number of water molecules is maximum in :

Decreasing order of stability of $O_2, O_2^-, O_2^+$ and $O_2^{2-}$ is :

Strong reducing behaviour of $H_3PO_2$ is due to :

On heating which of the following releases $CO_2$ most easily ?

Caprolactam is used for the manufacuture of :

Aqueous solution of which of the following compounds is the best conductor of electric current ?

Which one of the following pairs of solution is not an acidic buffer ?

If the equilibrium constant for <br> $N_2 (g) + O_2(g) \leftrightharpoons 2NO (g) $ is $K$, <br> the equilibrium constant for <br> $\frac{1}{2} N_2(g) + \frac{1}{2}O_2 (g) \leftrightharpoons NO (g) $ will be :

The number of structural isomers possible from the molecular formula $C_3H_9N$ is

Gadolinium belongs to 4f series. It's atomic number is 64. Which of the following is the correct electronic configuration of gadolinium?

2,3-Dimethyl-2-butene can be prepared by heating which of the following compounds with a strong acid?