Advertisement Remove all ads

HSC Science (Electronics) 12th Board Exam - Maharashtra State Board Important Questions for Chemistry

Subjects
Topics
Subjects
Popular subjects
Topics
Advertisement Remove all ads
Advertisement Remove all ads
Chemistry
< prev  1 to 20 of 1279  next > 

Define terms: Fuel cell

Appears in 13 question papers
Chapter: [0.04] Electrochemistry
Concept: Batteries > Primary Batteries

Write the chemical equations involved in the following reactions:(i) Hoffmann-bromamide degradation reaction

Appears in 12 question papers
Chapter: [0.13] Amines
Concept: Amines > Preparation of Amines

Write the chemical equations involved in the following reactions:(i) Hoffmann-bromamide degradation reaction

Appears in 12 question papers
Chapter: [13.01] Amines
Concept: Amines > Preparation of Amines

The following data were obtained during the first order thermal decomposition of SO2Cl2 at a constant volume :

SO2Cl2 (g) → SO2 (g) + Cl2 (g)

Experiment Time/s–1 Total pressure/atm
1 0 0.4
2 100 0.7

Calculate the rate constant.

(Given : log 4 = 0.6021, log 2 = 0.3010)

Appears in 6 question papers
Chapter: [0.05] Chemical Kinetics
Concept: Factors Influencing Rate of a Reaction

Account for the following : Nitrogen does not form pentahalide.

Appears in 6 question papers
Chapter: [7.01] Group 15 Elements
Concept: p-Block elements of Group 15 Elements > Dinitrogen

State Henry’s law.

Appears in 5 question papers
Chapter: [0.02] Solutions and Colligative Properties
Concept: Solubility > Solubility of a Gas in a Liquid

Explain the term Antiseptics

Appears in 5 question papers
Chapter: [16.01] Chemicals in Medicines
Concept: Drugs and Their Classification

Define limiting molar conductivity.

Appears in 4 question papers
Chapter: [0.04] Electrochemistry
Concept: Conductance of Electrolytic Solutions > Variation of Conductivity and Molar Conductivity with Concentration

For a reaction A + B ⟶ P, the rate is given by

Rate = k [A] [B]2

How is the rate of reaction affected if the concentration of B is doubled?

Appears in 4 question papers
Chapter: [0.05] Chemical Kinetics
Concept: Factors Influencing Rate of a Reaction

For a reaction A + B ⟶ P, the rate is given by

Rate = k [A] [B]2

What is the overall order of reaction if A is present in large excess?

Appears in 4 question papers
Chapter: [0.05] Chemical Kinetics
Concept: Factors Influencing Rate of a Reaction

[NiCl4]2− is paramagnetic, while [Ni(CO)4] is diamagnetic, though both are tetrahedral. Why? (Atomic number of Ni = 28)

Appears in 4 question papers
Chapter: [0.09] Coordination Compounds
Concept: Bonding in Coordination Compounds > Magnetic Properties of Coordination Compounds

On the basis of crystal field theory, write the electronic configuration for d4 ion if ∆0 < P.

Appears in 4 question papers
Chapter: [0.09] Coordination Compounds
Concept: Bonding in Coordination Compounds > Crystal Field Theory (CFT)

Distinguish between crystalline solid and amorphous solid

Appears in 3 question papers
Chapter: [0.01] Solid State
Concept: Types of Solids

An element crystallizes in a f.c.c. lattice with a cell edge of 250 pm. Calculate the density if 300 g of this element contains 2 × 1024 atoms. 

Appears in 3 question papers
Chapter: [0.01] Solid State
Concept: Calculations Involving Unit Cell Dimensions

An element with molar mass 27 g mol−1 forms a cubic unit cell with edge length 4.05 ✕ 10−8 cm. If its density is 2.7 g cm−3, what is the nature of the cubic unit cell?

Appears in 3 question papers
Chapter: [0.01] Solid State
Concept: Number of Atoms in a Unit Cell

Define the following term

Schottky defect

Appears in 3 question papers
Chapter: [0.01] Solid State
Concept: Imperfections in Solids - Introduction

An element with density 2.8 g cm–3 forms a f.c.c. unit cell with edge length 4 x 10–8 cm. Calculate the molar mass of the element.

(Given : NA = 6.022 x 1023 mol –1)

Appears in 3 question papers
Chapter: [0.01] Solid State
Concept: Calculations Involving Unit Cell Dimensions

Sodium crystallizes in bcc structure. If the edge length of unit cell is 4.3 × 10-8 cm, the radius of Na atom is ______.

Appears in 3 question papers
Chapter: [0.01] Solid State
Concept: Classification of Crystalline Solids

Sodium crystallizes in bcc structure. If the edge length of unit cell is 4.3 × 10-8 cm, the radius of Na atom is ______.

Appears in 3 question papers
Chapter: [0.01] Solid State
Concept: Classification of Crystalline Solids

A substance crystallizes in fcc structure. The unit cell edge length is 367.8 pm. Calculate the molar mass of the substance if its density is 21.5 g/cm3.

Appears in 3 question papers
Chapter: [0.01] Solid State
Concept: Packing Efficiency
< prev  1 to 20 of 1279  next > 
Advertisement Remove all ads
Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×