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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 5751. |
Which of the following fibre is made of a large number ester units. Teflon . Pvc. Bakelite . Polyester |
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Answer» Which of the following fibre is made of a large number ester units. Teflon . Pvc. Bakelite . Polyester |
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| 5752. |
Towards the end of 19th century, scientists were successful in obtaining a fibre having properties similar to that of silk and it is referred as artificial silk. What is this artificial silk called? |
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Answer» Towards the end of 19th century, scientists were successful in obtaining a fibre having properties similar to that of silk and it is referred as artificial silk. What is this artificial silk called? |
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| 5753. |
In Bohr's model of an atom, which letters are used to represent the orbits? |
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Answer» In Bohr's model of an atom, which letters are used to represent the orbits? |
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| 5754. |
Name any five useful substances which are manufactured from petrochemicals. |
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Answer» Name any five useful substances which are manufactured from petrochemicals. |
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| 5755. |
Why causes the dissolution of common salt (NaCl) in water? |
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Answer» Why causes the dissolution of common salt (NaCl) in water? |
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| 5756. |
The substance that is composed of two or more elements chemically combined with one another in a fixed proportion of mass is called ___ . |
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Answer» The substance that is composed of two or more elements chemically combined with one another in a fixed proportion of mass is called |
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| 5757. |
When water is electrolyzed, which gas is collected at the cathode? |
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Answer» When water is electrolyzed, which gas is collected at the cathode? |
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| 5758. |
The plastic which is coated on the uniforms of fireman to make them fire -resistant is : (a) bakelite (b) polythene (c) teflon (d) melamine |
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Answer» The plastic which is coated on the uniforms of fireman to make them fire -resistant is : (a) bakelite (b) polythene (c) teflon (d) melamine |
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| 5759. |
The man-made fibre rayon is chemically identical to : (a) wool (b) silk (c) jute (d) cotton |
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Answer» The man-made fibre rayon is chemically identical to : (a) wool (b) silk (c) jute (d) cotton |
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| 5760. |
Which among the following is the purest form of natural water? |
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Answer» Which among the following is the purest form of natural water? |
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| 5761. |
What are the components of clean, dry air ? |
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Answer» What are the components of clean, dry air ? |
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| 5762. |
Which of the following is not a synthetic fibre? |
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Answer» Which of the following is not a synthetic fibre? |
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| 5763. |
The reason for the decline of polyester industry during the mid-1960s was ___ . |
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Answer» The reason for the decline of polyester industry during the mid-1960s was |
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| 5764. |
Identify the types of matter that are considered as fluids. |
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Answer» Identify the types of matter that are considered as fluids. |
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| 5765. |
Why should we not wear clothes made of synthetic fibres (like nylon or polyester) while working in the kitchen ? |
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Answer» Why should we not wear clothes made of synthetic fibres (like nylon or polyester) while working in the kitchen ? |
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| 5766. |
X Y Protons = 6 6 Neutrons = 6 8 Species X and Y are: |
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Answer»
Species X and Y are: |
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| 5767. |
Which of the following is a combustion reaction? |
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Answer» Which of the following is a combustion reaction? |
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| 5768. |
Answer in short. What is acid Rain? |
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Answer» Answer in short. What is acid Rain? |
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| 5769. |
Why is agap left between two cement tiles?? |
| Answer» Why is agap left between two cement tiles?? | |
| 5770. |
How electricity is generated in solar panels ? |
| Answer» How electricity is generated in solar panels ? | |
| 5771. |
The density of water is maximum at ____∘ C.4 |
Answer» The density of water is maximum at ____∘ C.
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| 5772. |
Out of the four substances which one can easily remove an electron from another substance? |
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Answer» Out of the four substances which one can easily remove an electron from another substance? |
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| 5773. |
Which of these will produce fewer air pollutants? |
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Answer» Which of these will produce fewer air pollutants? |
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| 5774. |
How does skeletal chemical equations differ from balanced chemical equations |
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Answer» How does skeletal chemical equations differ from balanced chemical equations |
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| 5775. |
Some examples for electrolytic decomposition reaction. |
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Answer» Some examples for electrolytic decomposition reaction. |
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| 5776. |
What is anodizing? Can we only anodize aluminium? If yes,why? If no,give other examples (other than aluminium) to explain. |
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Answer» What is anodizing? Can we only anodize aluminium? If yes,why? If no,give other examples (other than aluminium) to explain. |
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| 5777. |
What is caloriphic value ? |
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Answer» What is caloriphic value ? |
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| 5778. |
Which of the following cannot be elements? |
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Answer» Which of the following cannot be elements? |
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| 5779. |
Which of the following cases shows work done by the force is non-zero? |
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Answer» Which of the following cases shows work done by the force is non-zero? |
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| 5780. |
A boy lifts a luggage from height 2m to 4m. The potential energy will become___the initial. |
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Answer» A boy lifts a luggage from height 2m to 4m. The potential energy will become |
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| 5781. |
What does oil or fat react with to produce soap and glycerine? |
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Answer» What does oil or fat react with to produce soap and glycerine? |
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| 5782. |
The alkali formed by the reaction of sodium with water is ____________. |
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Answer» The alkali formed by the reaction of sodium with water is ____________. |
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| 5783. |
Which of the following is incorrect? |
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Answer» Which of the following is incorrect? |
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| 5784. |
Thermoplastics are |
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Answer» Thermoplastics are |
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| 5785. |
Identify the regions in India where vast reserves of natural gas are not found. |
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Answer» Identify the regions in India where vast reserves of natural gas are not found. |
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| 5786. |
What are the advantages of using natural gas (or CNG) as a fuel ? |
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Answer» What are the advantages of using natural gas (or CNG) as a fuel ? |
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| 5787. |
What is the abbreviation for an element called? |
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Answer» What is the abbreviation for an element called? |
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| 5788. |
When H2S gas is passed through the blue solution of CuSO4, a black precipitate of copper sulphide is obtained and the sulphuric acid formed remains in the solution. The reaction is an example of: |
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Answer» When H2S gas is passed through the blue solution of CuSO4, a black precipitate of copper sulphide is obtained and the sulphuric acid formed remains in the solution. The reaction is an example of: |
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| 5789. |
Give reasons : (a)Alcohol is mixed with water and is used in car radiators. (b) Icebergs float on ocean water. (c) Carbonated drinks are bottled under high pressure. |
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Answer» Give reasons : (a)Alcohol is mixed with water and is used in car radiators. (b) Icebergs float on ocean water. (c) Carbonated drinks are bottled under high pressure. |
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| 5790. |
Give 1 example which illustrates the following characteristics of a chemical reaction (I) evolution of gas (II) change of colour |
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Answer» Give 1 example which illustrates the following characteristics of a chemical reaction (I) evolution of gas (II) change of colour |
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| 5791. |
What is formed when a diamond is heated in vaccum? |
| Answer» What is formed when a diamond is heated in vaccum? | |
| 5792. |
The solubility of potassium chloride (KCl) and Hydrogen chloride (HCl) for different temperatures is given in the table below: Temperature (degree celsius) 10 20 30 40 50 80 Solubility (g per 100 ml), KCl 31.2 34.2 37.2 40.1 42.6 51.5 Solubility (g per 100 ml), HCl 75 70 65.5 61 57.5 51.5 At what temperature, both substances have the same solubility ? |
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Answer» The solubility of potassium chloride (KCl) and Hydrogen chloride (HCl) for different temperatures is given in the table below:
At what temperature, both substances have the same solubility |
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| 5793. |
What is a solar cell and how does it store energy? |
| Answer» What is a solar cell and how does it store energy? | |
| 5794. |
The activation energy for a reaction at the temperature TK was found to be 2.303 RTJmol−1. The ratio of the rate constant to Arrhenius factor is ___ |
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Answer» The activation energy for a reaction at the temperature TK was found to be 2.303 RTJmol−1. The ratio of the rate constant to Arrhenius factor is |
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| 5795. |
The options are :- Sugar Water Milk Salt |
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Answer» The options are :- Sugar Water Milk Salt |
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| 5796. |
What is ionization energy. |
| Answer» What is ionization energy. | |
| 5797. |
Solid copper sulphate does not conduct electricity, but when it is dissolved in water it does conduct electricity. Why? |
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Answer» Solid copper sulphate does not conduct electricity, but when it is dissolved in water it does conduct electricity. Why? |
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| 5798. |
Among the following four types/grades of coal, which grade has the highest carbon content? |
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Answer» Among the following four types/grades of coal, which grade has the highest carbon content? |
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| 5799. |
Which of the following is correct with respect to calorific value? |
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Answer» Which of the following is correct with respect to calorific value? |
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| 5800. |
The major constituent of colloid is dispersed ___. |
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Answer» The major constituent of colloid is dispersed |
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