Identify the correct statement(s) with respect to the following reaction :
Zn + 2HCl \(\longrightarrow\) ZnCl₂ + H₂
(i) Zinc is acting as an oxidant
(ii) Chlorine is acting as a reductant
(iii) Hydrogen is not acting as an oxidant
(iv) Zn is acting as a reductant

A macroscopic particle of mass 100 g and moving at a velocity of 100 cm S^-1 will have a de Broglie wavelength of ___________

On moving from left to right across a period in the periodic table, the metallic character__________.

Zeolite used to soften hardness of water is hydrated _____________

Which one of the following is known as natural insulator?

Which of the following gas is essential for our survival?

The heat of formation of CO and CO₂ are - 26.4 kcal and - 94 kcal, respectively. Heat of combustion of carbon monoxide will be ____________

The formation of ammonia from N₂(g) and H₂(g) is a reversible reaction
N₂(g) + 3H₂(g) ⇌ 2NH₃(g) + Heat
What is the effect of increase of temperature on this equilibrium reaction ______________

Which one of the following binary liquid mixtures exhibits positive deviation from Raoults law ?

The shape of IF₇ molecule is ___________

The IUPAC name of the compound CH₃ – CH = CH – C ≡ CH is _________

Which one of the following is an example for free radical initiators ?

Conformation arise due to rotation around ___________

In SN₁, the rate of the reaction depends on the ______________.

Assertion (A) : Excessive use of chlorinated pesticide causes soil and water pollution.
Reason (R) : Such pesticides are non-biodegradable.
i) Both (A) and R are correct and (R) is the correct explanation of (A)
ii) Both (A) and R are correct and (R) is not the correct explanation of (A)
iii) Both (A) and R are not correct
iv) (A) is correct but( R) is not correct

Calculate the equivalent mass of the following : CO₃^-2,

How many radial nodes for 2s, 4p, 5d and 4f orbitals exhibit? How many angular nodes

Explain what is meant by efflorescence.

Define rate of diffusion

What are the scope of thermodynamics?

Deduce the Vant Hoff equation.

Draw the lewis structure of PCl₅ and SF₆

Describe the classification of organic compounds based on their structure.

What are Freons? Discuss their uses and environmental effects

Calculate the number of atoms / molecules present in the following 1.8 gram of water

The quantum mechanical treatment of the hydrogen atom gives the energy value:
\({ E }_{ n }=\frac { -13.6 }{ { n }_{ 2 } } ev{ \ atom }^{ -1 }\)
(i) use this expression to find ΔE between n = 3 and n = 4
(ii) Calculate the wavelength corresponding to the above transition.

In what period and group will an element with Z = 118 will be present?

What is hydrogen bonding?

Write balanced chemical equation for each of the following chemical reactions.
Lithium metal with nitrogen gas.

Explain the graphical representation of Boyle's law.

The equilibrium constant of a reaction is 10, what will be the sign of ΔG? Will this reaction be spontaneous?

Vapour pressure of a pure liquid A is 10.0 torr at 27°C. The vapour pressure is lowered to 9.0 torr on dissolving one gram of B in 20 g of A. If the molar mass of A is 200 then calculate the molar mass of B.

Which bond is more polar in the following pair of molecular?
(i) H₃C-H (or) H₃C-Br
(ii) H₃C-NH₂ (or) H₃C-OH
(iii) H₃C-OH (or) H₃C-SH

Balance the following equations by oxidation number method.
CuO + NH₃ ⟶ Cu +N₂ + H₂O

Calculate the de Broglie wavelength of an electron that has been accelerated from rest through 1potential differences of 1 KV.

I.E increases as we move across the period but Ionisation enthalpies (I.E) of second period of elements in the order.
Li < B < Be < C < O < N < F < Ne
Explain why?
(i) Be has higher I.E and B
(ii) O has lower I.E than N & F

A group-1 metal (A) which is present in common salt reacts with (B) to give compound (C) in which hydrogen is present in –1 oxidation state. (B) on reaction with a gas (C) to give universal solvent (D). The compound (D) on reacts with (A) to give (E), a strong base. Identify A, B, C, D and E. Explain the reactions.

Distinguish between alkali metals and alkaline earth metals.

The enthalpy of combustion for H₂, C_(graphite) and CH₄ are -285.8, -393.5 and -890.4 kJ mol^-1respectively. Calculate the standard enthalpy of formation \(\Delta { H }_{ f }^{ 0 }\) for CH₄

Explain about the salient features of molecular orbital theory.

Identify the compound A, B, C and D in the following series of reactions

The simplest aromatic hydrocarbon C₆H₆ reactsⒷ on treatment with sodium hydroxide will (C₆H₅OH), Phenol, © as the product. Also Cl₂ to giveⒶ which on reaction with sodium hydroxide gives Ⓑ.Ⓑ of molecular formula C₆H₆O. @ on treatment with ammonia will give C₆H₇N as @. Identify Ⓐ, Ⓑ, ©, and explain the reactions involved.

Ethane burns completely in air to give CO₂, while in a limited supply of air gives CO. The same gases are found in automobile exhaust. Both CO and CO₂ are atmospheric pollutants
i) What is the danger associated with these gases
ii) How do the pollutants affect the human body ?