2021-05-11 07:53:08
PREVIOUS YEAR ASKED CHEMISTRY QUESTION IN VARIOUS EXAMS.
The chemical name of Quartz is? - Sodium Silicate
SMOG is a combination of - Smoke and Fog
The highest percentage of carbon is found in which form of coal? - Anthracite
Acids react with bases to give – Salt
Plaster of Paris is made from – Gypsum
Methane is present in the atmosphere of – Mars
The main component of honey is – Fructose
Which one of the following acids is used in the manufacturing of baking powder – Tartaric Acid
Which acid is used in photography – Oxalic Acid
Fertiliser having high nitrogen content is - Ammonium nitrate
The gas used for artificial fruit ripening of green fruit is – Ethylene
Which of the following has the longest wavelength - Radio waves
Tritium is an isotope of – Hydrogen
Meson was discovered by – Yukawa
The maximum number of electrons on a principal shell is - 2n²
The horizontal line in modern periodic table is called – Period (RRB GROUP D 2018)
Alkali metals are in a group - I A
The elements in group zero are called - Inert gases(RRB JE CBT-2 2019)
The mineral which helps blood clotting
Ans : Calcium( HSSC 2019)
Chemical name of Picric Acid is? – Tri Nitro Phenol(UPPSC 2018)
is known as laughing gas? – N2O(RRB GROUP D 2018)
Which material is used in making of safety matches? – Red Phosphorous( UPSSSC 2019)
Nail polish remover contains? – Acetone
(RRB JE 2019)
Which acid is present in Orange? – Citric Acid(SSC MTS 2019)
Lead pencil contains _ . –Graphite(RRB NTPC 2016)
Which gas is used in filling electric bulbs ? – Argon (RRB JE 2019)
Lightest metal? – Lithium(RRB GROUP D 2018)
Acid rain is due to air pollution by? – Nitrous Oxide & Sulphur dioxide(RRB ALP 2018)
Ozone is _ – Diamagnetic
(UPSSC 2018)
Petroleum is found in – Sedimentary Rocks (RRB RPF SI 2018)
Which gas is used in fire extinguisher? – carbon dioxide
(RRB GROUP D 2018)
The most abundantly occurring element in the earth-crust is – oxygen( RRB NTPC 2016)
Which is the major constituent of soda lime glass – calcium oxide (UPPSC 2018)
How many atoms are present in one molecule of Ozone – 3
Which metal is responsible for Itai-Itai disease – Cadmium
(RRB JE 2019)
24 viewsDipanshu Mishra, 04:53
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