HSC Science (Computer Science) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions for Chemistry

An ionic compound crystallises in FCC type structure with ‘A’ ions at the centre of each face and ‘B’ ions occupying corners of the cube. The formula of compound is _______.

0.05 M NaOH solution offered a resistance of 31.6 Ω in a conductivity cell at 298 K. If the cell constant of the cell is 0.367 cm^-1, calculate the molar conductivity of NaOH solution.

Which of the following vitamins is the vitamin of alicyclic series?

(A) Vitamin C

(B) Vitamin K

(C) Vitamin B

(D) Vitamin A

The unit of rate constant for zero order reaction is _______.

(A) t^–1

(B) mol dm^–3 t^–1

(C) mol^–1 dm³ t^–1

(D) mol^–2 dm⁶ t^–1

10.0 grams of caustic soda when dissolved in 250 cm³ of water, the resultant gram molarity of solution is _______.

(A) 0.25 M

(B) 0.5 M

(C) 1.0 M

(D) 0.1 M

Classify the following solids into different types:

a. Ammonium phosphate

b. Brass

c. S₈ molecule

d. Diamond

In the following 

The compound ‘B’ is _______.
(A) Propan–1–amine

(B) Propan–2–amine

(C) Isopropylamine

(D) Dimethylamine

Ethylidene dichloride when boiled with aqueous solution of NaOH yields _______.

(A) formaldehyde

(B) acetaldehyde

(C) acetone

(D) ethyl methyl ketone

How is phenol prepared from cumene?

How is peptide linkage formed?

How is nitroethane converted into ethylamine.

How will you prepare ethanol, propan-2-ol and 2-methylpropan-2-ol from Grignard’s reagent?

Which among the following reactions is an example of a zero order reaction?

a) `H_(2(g)) + I_(2(g)) -> 2HI_(g)`

b) `2H_2O_(2(l)) -> 2H_2O_(l) + O_(2(g))`

c) `C_12H_22O_(11(aq)) + H_2O_(l) -> C_6H_12O_(6(aq)) + C_6H_12O_(6(aq))`

d) `2NH_(3g)`   `N(2g) + 3H_(2(g))`

The conductivity of 0.02 M AgNO₃ at 25°C is 2.428 × 10⁻³ Ω⁻¹ cm⁻¹. What is its molar conductivity?

Natalite is a mixture of

(a) diethyl ether and methanol

(b) diethyl ether and ethanol

(c) dimethyl ether and methanol

(d) dimethyl ether and ethanol

What is effective atomic number of Fe (z = 26) in [Fe(CN)₆]^4-?

(a) 12

(b) 30

(c) 26

(d) 36

Which of the following compounds is NOT prepared by the action of alcoholic NI₃ on alkyl halide?

(a) CH₃NH₂

(b) CH₃- CH₂- NH₂

(c) CH₃ - CH₂ - CH₂ - NH₂

(d) (CH₃)₃ C- NH₂

Write four points of distinction between Lanthanoids and Actinoids.

Write the formulae of the raw materials used for preparation of Dextran.

Write a note on Sandmeyer's reaction.