When a substance is heated its density.? a) Increase b) Decrease c) Remains same
When a substance is heated its volume increases and as a result density decreases as intermolecular space increases. When water... View Article
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What is Landolt’s experiment?
In Landolt’s experiment, NaClandAgNO3 were taken in a U-Shaped tube and weighed. The tubes were tilted to let the solutions... View Article
Give some examples of magnetic separation.
Magnetic Separation is one of the most common and important physical separation techniques. Magnetic Separation is which separating components of... View Article
The compound that is most difficult to protonate is?
Phenol is most difficult to protonate. Due to the presence of lone pair of electrons in reasons in phenol, it... View Article
Complete the following reactions. CH3CH2Br + KCN→?
Whenever alkyl bromides, in the form if R-X, where R is the alkyl group and X is the halogen group,... View Article
Write the balanced chemical equations for the following reactions. (a) Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water (b) Zinc + Silver nitrate → Zinc nitrate + Silver (c) Aluminium + Copper chloride → Aluminium chloride + Copper (d) Barium chloride + Potassium sulphate → Barium sulphate + Potassium chloride
Answer: The representation of a chemical reaction in the form of substances is known as a chemical equation. The equation... View Article
What is granulated zinc?
The zinc metal with high surface area and high particle size are called zinc granules. It is preferred for laboratory... View Article
What is the mixture of calcium aluminate and calcium silicate is called?
A fine grey powder of calcium silicate and calcium aluminate is known as cement. Cement is the binding substance that... View Article
How mixture of sand and sulphur can be be separated effectively?
Mixture of sand and sulphur may best be separated by Dissolving in CS2 and filtering. Sand and Sulphur powder is... View Article
What is active mass of 5g CaO?
Active mass of solids is a constant quantity. i.e. unity. Therefore, the active mass of CaO is 1 gram because... View Article
What are saturated and unsaturated solutions?
Saturated solution is a solution that contains the maximum amount of solute that is capable of being dissolved whereas unsaturated... View Article
Which variety of glass is heat resistant? A. Hard glass B. Flint glass C. Pyrex glass D. Bottle glass
Pyrex glass is heat-resistant. Pyrex glass is a borosilicate glass first produced by The Corning Glass Works company. Pyrex also... View Article
Calculate the number of p atoms in one mole of p4.
1 mole of P4 = 6.023 x 1023 molecules of P4. 1 molecule of P4 = 4 atoms of P.... View Article
Why is the curve representing ohm’s law linear?
The curve representing Ohms law is Linear. Ohm’s law exhibits a linear relationship between the applied voltage and the resulting... View Article
How is nanometre related to angstrom?
1nanometre=10Angstrom. An angstrom = 0.1 nanometer The nanometre is a bigger unit of length than angstrom. But,both are used to... View Article
What is cryogenic agent?
Cryogenics is the production of and behaviour of materials at very low temperatures. The most common gases that are turned... View Article
What is the atomicity of neon?
Neon is an inert gas (noble gas), natural, atomic number 10; it is a monoatomic gas and its atomicity is... View Article
The storage battery generally used in an electric power station is? a. Nickel-cadmium battery. b. Zinc-carbon battery. c. Lead-acid battery.
The storage battery generally used in an electric power station is Lead-acid battery. It is cost-effective and provides a steady... View Article
Why does the solution of magnesium chloride conduct electricity?
A solution of Magnesium Chloride conducts electricity because it is a strong electrolyte and dissociates into ions when electricity is... View Article
Which one of the following fertilizers is known as ‘Kisan Khad’?; 1) Urea 2) Calcium Ammonium Nitrate 3) None of these 4) Ammonium Sulphate.
The fertilizer known as ‘Kisan Khad’ is Calcium Ammonium Nitrate (CAN). CAN is a Calcareous and Nitrogenous fertilizer. CAN is... View Article
