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Find the names of natural organic acid and their sources.

Vinegar: Acetic acid Apple: Malic acid Tamarind: Tartaric acid. Milk: Lactic acid Lemon: Citric acid. Tomato: Ascorbic acid. Grapes: Tartaric... View Article

The term brown air is used for (1) acid fumes (2) photochemical smog (3) sulphurous smog (4) Industrial smog

Photochemical smog which is mainly composed of ozone (O 3 ), Peroxyacetyl nitrate (PAN) and Nox, is also known as... View Article

What is the valency of fluoride?

The fluorine atom has 7 electrons in the outermost shell. In the case of fluoride ion , the charge is... View Article

How will you prepare 2-methyl-propan−2−ol from methyl magnesium bromide?

Propanone is made reacted with methyl magnesium bromide to form an adduct which is the hydrolysed to form 2-methyl-propan−2−ol. Methyl... View Article

State the colour of phenolphthalein in soap solution

Phenolphthalein is an indicated which is used in the acid-base titrations. In Acidic solution phenolphthalein is colourless but in basic... View Article

What is the difference between Fog and Dew?

Fog is an atmospheric condition characterized by the cloud appearing close to or at the earth’s surface. Dew is the... View Article

Explain the formation of sodium chloride.

Sodium chloride is a compound formed from the ionic bonding of sodium and chloride. Sodium chloride is formed when sodium... View Article

What is the molecular mass of toluene?

The molecular mass of Toluene is 92.14g/mol . Toluene is a carbon-based compound with the chemical formula C7H8.

Calculate the number of atoms in each of the following (i) 52 moles of Ar (ii) 52 u of He (iii) 53 g of He

1 mole of Ar = 6 . 022 × 1023 atoms of Ar 52 mol of Ar = 52 ×... View Article

Name the following/ 1.a metal which is preserved in kerosene 2.a lustrous coloured non-metal 3.a metal which can melt while kept on a palm 4.a metal which is a poor conductor of heat

Metal which are preserved in kerosene – Sodium, Lithium and Potassium. Lustrous coloured non-metal – Iodine and Diamond . They... View Article

Solder is an alloy of Pb and _____?

Solder is an alloy that is mainly made up of tin and lead. Lead (Pb) and tin (Sn) are the... View Article

Acid rain occurs when the atmosphere is heavily polluted with ______

Acid rain occurs when sulphur dioxide (SO2) and nitrogen oxides (NOX) are emitted into the atmosphere and transported by wind... View Article

What is the formula of copper glance and zinc blend?

Copper glance a mineral consisting of cuprous sulphide, Cu2S. Zinc blend is ZnS. The mentioned copper glance and zinc blend... View Article

What is the difference between onshore and offshore winds?

Onshore wind is the one that blows from the sea towards the land. Whereas, offshore wind is the type of... View Article

Why Nitrogen has maximum covalency of 4?

Nitrogen shows maximum covalency of 4 whereas other heavier elements of the group show higher covalency because of the absence... View Article

05 Apr 2021: PIB Summary & Analysis

April 5th, 2021, PIB:- Download PDF Here TABLE OF CONTENTS 1. Chenab Bridge 2. Babu Jagjivan Ram 3. International Virtual... View Article

Which of the following pairs will not exhibit diffusion? a) Hydrogen, oxygen b) Oxygen, water c) Salt, sand d) Sugar crystals, water

Answer: (c) Salt, sand Diffusion is defined as the movement of molecules or atoms from a region of high concentration... View Article

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