STANDARD Chemistry Class 12 Questions

The cell reaction of the galvanic cell : Cu(s)|Cu²⁺(aq)||Hg²⁺(aq)|Hg(l) is

The general formula of carbohydrates is

Which of the following carbonyl compounds is most polar?

Identify the basic amino acid from the following.

Which of the following is a primary halide?

In allylic and benzylic alcohols, –OH group is attached to

Which one of the following is a 'd-block element'?

The number of ions given by [Pt(NH₃)₆]Cl₄ in aqueous solution will be

For a reaction, P + Q → 2R + S. Which of the following statements is incorrect?

Which one of the following reducing agents is likely to be most effective in bringing about the following change? R−C−NH₂

Homogeneous mixture of two or more than two components is called

Zr and Hf have almost equal atomic and ionic radii because of

The two functional groups characteristic of sugars are

Cellulose is a

Which of the following reactions is possible at anode?

Which of the following is an example of gaseous solution?

For the reaction, 2N₂O₅ → 4NO₂ + O₂, the rate of reaction can be expressed in terms of time and concentration by the expression:

Arrange the following complexes in increasing order of conductivity of their solutions. (i) [Co(NH₃)₃Cl₃] (ii) [Co(NH₃)₄Cl₂]Cl (iii) [Co(NH₃)₆]Cl₃ (iv) [Co(NH₃)₅Cl]Cl₂

Which of the following is not an allylic halide?

Which of the following is phenol?

What is the end product in the following sequence of reactions? COOH → PCl₅ → 2NH₃ → Br₂/KOH

Propanone can be prepared from ethyne by

Which of the following primary and secondary valencies are not correctly marked against the compound?

Consider the reaction: 2N₂O₄ ⇌ 4NO₂ If \( \frac{d[N_2O_4]}{dt} = k \) and \( \frac{d[NO_2]}{dt} = k' \) then

Which of the following is not correctly matched with the given example?

What is the mole fraction of glucose in 10% w/W glucose solution?

For the galvanic cell, Cu|Cu²⁺||Ag⁺|Ag. Which of the following observations is not correct?

Amine that cannot be prepared by Gabriel phthalimide synthesis is

Benedict's solution is used to identify

Tertiary amines have lowest boiling points amongst isomeric amines because

The standard reduction potential for the half-cell reaction, Cl₂ + 2e⁻ → 2Cl⁻ will be (Pt²⁺ + 2Cl⁻ → Pt + Cl₂, E° cell = -0.15 V; Pt²⁺ + 2e⁻ → Pt, E° = 1.20 V)

Ammonia acts as a very good ligand but ammonium ion does not form complexes because

What will be the mole fraction of ethanol in a sample of spirit containing 85% ethanol by mass?

Consider the reaction, 2N₂O₅ → 4NO₂ + O₂ In the reaction, NO₂ is being formed at the rate of 0.0125 mol L⁻¹ s⁻¹. What is the rate of reaction at this time?

Choose the correct X and Y in the given reactions.

According to Werner's theory of coordination compounds

In a cell reaction, Cu(s) + 2Ag⁺(aq) → Cu²⁺(aq) + 2Ag(s) E° cell = +0.46 V. If the concentration of Cu²⁺ ions is doubled then E° cell will be

The correct order of increasing basic nature of the following bases is

The C – O – H bond angle in alcohols is slightly less than the tetrahedral angle whereas the C – O – C bond angle in ether is slightly greater because

In a reaction, 2HI → H₂ + I₂, the concentration of HI decreases from 0.5 mol L⁻¹ to 0.4 mol L⁻¹ in 10 minutes. What is the rate of reaction during this interval?

How many Na⁺ ions are present in 100 mL of 0.25 M of NaCl solution?

When p-toluidine reacts with chloroform and alcoholic KOH, then the product is

Nitrogen dioxide (NO₂) dissociated into nitric oxide (NO) and oxygen (O₂) as follows: 2NO₂ → 2NO + O₂. If the rate of decrease of concentration of NO₂ is 6.0 × 10⁻¹² mol L⁻¹ s⁻¹, what will be the rate of increase of concentration of O₂?

The density of a solution prepared by dissolving 120 g of urea (mol. Mass = 60 u) in 1000 g of water is 1.15 g/mL. The molarity of this solution is

Among the following, which are ambidentate ligands. (i) SCN⁻ (ii) NO₃⁻ (iii) NO₂⁻ (iv) C₂O₄²⁻

Match the column I with column II and mark the appropriate choice.

Which of the following is not a neutral ligand?

What will be the molality of a solution of glucose in water which is 10% w/W?

The given structures (I) and (II) represent configuration of the simplest sugar glyceraldehyde. Which of the following statements is not correct for the structures? CHO | H — C — OH | CH₂OH (I) CHO | HO — C — H | CH₂OH (II)

Zn gives hydrogen with H₂SO₄ and HCl but not with HNO₃ because