Give the names of four greenhouse gases present in the atmosphere.
Carbon dioxide. Methane, Ozone and Nitrous oxide are the four green house gases.
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Write the chemical name of (a) lime water (b) the white insoluble solid formed on reaction of carbondioxide with lime water.
Answer: (a) Calcium Hydroxise (b) Calcium Carbonate
The electron configuration for Cu is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1 3d^10. How many valence electrons does Copper contain?
Copper contains one valence electron.
Formula and valency of chromate
The formula of chromate is \(\begin{array}{l}{textup CrO_{4}^{-2}}\end{array} \) and the valency is 2.
The purest form of natural water
The purest form of natural water is rain water.
The maximum amount of gas found in the air is
The maximum amount of gas found in the air is nitrogen.
Which of the following can be beaten into thin sheets?
Which of the following can be beaten into thin sheets? Zinc Phosphorous Sulphur Oxygen Answer: 1. Zinc
Marshalls acid is
Marshalls acid is known peroxydisulfuric acid. Peroxydisulfuric acid is an inorganic compound with the chemical formula H2S2O8.
Boiling point of acetone is
Boiling point of acetone is 56 °C.
Distinguish between crystalline solid and amorphous solid.
Difference crystalline solid and amorphous solids. CRYSTALLINE SOLIDS AMORPHOUS SOLIDS Atoms are arranged in regular 3 dimension They do not have... View Article
Natural rubber is a polymer of
Natural rubber is a polymer of isoprene (2 methyl-1, 3-butadiene) which has a chemical formula (C5H8)n.
Brass is an example of a
Brass is an example of a homogeneous mixture. It is an alloy made up of uniform composition of copper and... View Article
What are the examples of hydrotropism plants?
Hydrotropism means the tendency to grow or tend to reach the area with moisture content like the movement of roots... View Article
Draw a plant cell and label the parts which
(a) determines the function and development of the cell. (b) packages material coming from the endoplasmic reticulum. (c) provides the... View Article
The first human hormone produced by recombinant DNA technology is
(a) Insulin(b) Estrogen(c) Thyroxin(c) ProgesteroneCorrect answer: (a) InsulinThe first human hormone produced by recombinant DNA technology is insulin.
Reproductive age in women starts when their ______.
(a) menstruation starts(b) breasts start developing(c) body weight increases(d) height increasesCorrect answer: (a) menstruation startsReproductive age in women starts when... View Article
Pollination refers to the
(a) transfer of pollen from anther to ovary(b) transfer of male gametes from anther to stigma(c) transfer of pollen from... View Article
Draw the diagram of chloroplast.
The diagram of choloplast is as below: https://cdn1.byjus.com/wp-content/uploads/2020/11/chloroplast.png
Write the name of instrument used to measure heartbeat.
The name of the instrument used to measure heartbeat is Stethoscope. It is a medical instrument used for listening to... View Article
What do you mean by digestion?
The process of conversion of complex food substances to simple absorbable forms is called digestion and is carried out by... View Article
