Chemistry-Objective Related Question Answers
1276. The main chemical constituent of clay is?
aluminium silicate
1277. The mineral containing both magnesium and calcium is?
dolomite
1278. he metal does not give H2 on treatment with dilute HCL is?
Ag
1279. The number of g-molecule of oxygen in 6.02 x 1024CO molecules is?
5 gram of molecule
1280. The most extensive; commercially useful source of thorium as monazite sand occurs in India at?
Travancore coast
1281. The main active constituent of tea and coffee is?
caffeine
1282. The maximum number of isomers for an alkene with molecular formula C4H8 is?
4
1283. The hardest form of carbon is?
diamond
1284. The most important ore of aluminium is?
bauxite
1285. The organic reaction represented by equation CH3 - CH = O + H2NOH gives CH3 - CH - NH + H2O is an example of?
a condensation reaction
1286. The number of electrons presents in H+ is?
zero
1287. The hottest part of the gas flame is known as?
non-luminous zone
1288. The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is?
oxygen
1289. The isomerism which exists between CH3CHCI2 and CH2CI. CH2CI is?
positional isomerism
1290. The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3?
4
1291. The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in?
12 moles of KMnO4
1292. The National Chemical Laboratory is situated in?
Pune
1293. The mass number of an atom is equal to?
the number of nucleons
1294. The maximum number of covalent formed by nitrogen is?
4
1295. The formula C6H5-CO-CH3 represents?
Acetophenone
1296. The metal that is usually extracted from sea water is?
Mg
1297. The method of concentrating the ore which makes use of the difference in density between ore and impurities is called?
levigation
1298. The inert gases are ____ in water?
sparingly soluble
1299. The molecular formula of phosphorous is?
P4
1300. The names of the scientists; Newlands; Mendeleev; and Meyer are associated with the development of?
periodic table of contents
© 2002-2017 Omega Education PVT LTD...Privacy | Terms And Conditions
Question ANSWER With Solution