reaction occurs when sodium sulphate reacts with barium chloride
1.Single combination
2.Single displacement
3. Double displacement
4. Double combination
Theory of Evolution tells us how life evolved from simple to more complex forms
1.Darwins
2.Wallace
3.Mendel's
4.Lamarck's
A change in which one or more new substances are formed is called _________.
1.Physical Change
2.Chemical Change
3.Rusting
4.Galvanisation
Adding which substance gives blue colour to glass?
1.Manganese oxide
2.Cobalt oxide
3.Chromium oxide
4. Iron oxide
Alkali metals can
1.be highly unstable at room temperature
2.vaporize at room temperature
3.easily gain electrons
4.easily lose electrons
All atoms of the same element have the same
1.number of protons
2.number of electrons
3.atomic number
4.All of the above
Atoms of same element having different mass numbers are called__________
1.Isobars
2.Isotopes
3.Isotones
4.Isomers
Atoms of the same element can differ in
1.Atomic number
2.Atomic mass
3.electrons
4.None of the above
Barbituric Acid was synthesized in 1864 by
1.Adolf von Baeyer
2.Marie Curie
3.Mendeleev
4.John Dalton
Carbon dioxide is one of the gases that cause the _________.
1.greenhouse effect
2.ozonification
3.oven phenomenon
4.sunburn
Covalent bonds are formed when electrons are
1.Transfer of electrons
2.Sharing of electrons
3.Dividing of electrons
4.All of the above
Group 7A of the periodic table contains the
1.most reactive metals
2.least reactive non metals
3.most reactive non metals
4.least reactive metals
How many carbon and hydrogen atoms are there in Propane, respectively?
1.2, 4
2.2, 6
3.4, 7
4.3, 8
In general the largest component of bog soils is
1.organic matter
2.water
3. living organisms
4.air
In the modern periodic table. periods ............ and ........ contain Lanthanoides and Actinoides.
1.3 and 4
2.6 and 7
3.4 and 5
4.5 and 6
Monazite is an ore of
1.Platinum
2.Radium
3.Uranium
4.Lanthanum
Non metal found in liquid state?
1.Chlorine
2.Bromine
3.Fluorine
4.Iodine
One turn of the citric acid cycle produces
1.two molecules of carbon dioxide are released
2.three molecules of NADH and one molecule of FADH2 are generated
3.one molecule of ATP or GTP is produced
4.All of the above
Plaster of Paris ______. I. changes into gypsum on mixing with water II. is CaSO4.2H2O III. is used for decoration
1.Only I and II
2.Only I and III
3.Only II and III
4.All I, II and III
Synthetic detergents are prepared from
1.potassium salts of higher fattyÂacids
2.sodium salts of higher fattyÂacids
3.hydrocarbons of petroleum
4. glycerides
The chemical makeup of a rock is
1.Nutrients
2.Minerals
3.Metals
4.Water
The complexity and variety of organic molecules is due to
1.their interaction with water
2.their tremendously large sizes
3.the chemical versatility of carbon atoms
4.the variety of rare elements in organic molecules
The first two steps in the lithification process are
1.Cementation and Proposal
2.Compaction and Ratification
3.Compaction and Cementation
4.Ratification and Cementation
The mass number of an isotope of an element is 298. If its nucleus has 189 neutrons, what is its atomic number?
1.298
2.189
3.109
4.487
The mass of one molecule of oxygen is
1.2.3 x 10-23 g
2.3.3 x 10-23 g
3.4.3 x 10-23 g
4.5.3 x 10-23 g
The movement of water molecules through the plasma membrane is called ______.
1.Osmosis
2.Sedimentation
3.Precipitation
4.Transpiration
The principal quantum number indicates what property of an electron?
1.energy of electron
2.distance of electron from nucleus
3.both a & b
4.number of subshells
Turquoise is an ore/mineral of
1.Copper
2.Manganese
3.Mercury
4.Tin
What happens to electrons in an ionic bond?
1.collision of electrons
2.Sharing of electrons
3.Both A & B
4.Transfer of electrons
What two elements are used to make bronze?
1.Lead and copper
2.copper and tin
3. Tin and lead
4.copper and iron
When Granite rocks get metamorphosed, they form
1.Quartzite
2.Gneiss
3.Marble
4.Slate
Which among the following is false about acids?
1.They give H+ ions in aqueous solution
2.Most acids contain hydrogen
3.They turn blue litmus red
4.They are bad conductor of electricity in aqueous solution
Which best describes the nucleus of an atom?
1.It is the densest part of the atom
2.It has neutrons
3. It has protons
4.All of the above
Which chemical is present in the cells of cork of tree which makes them impervious to gases and water
1.Cellulose
2.Suberin
3.Pectin
4.Lignin
Which element is not a part of a nitrogenous base?
1.Carbon
2.Oxygen
3.Phosphorous
4.Nitrogen
Which is a compound that contains carbon?
1.Ethane
2.Propane
3.Methane
4.All of the above
Which metal is responsible for Itai-Itai disease?
1.Cadmium
2.Nickel
3.Chromium
4.Mercury
Which of the following gases is not generated in a biogas plant?
1.H2S
2.CO2
3.CH4
4.CO
Which of the following has largest atomic radius?
1.Li
2.Be
3.B
4.O
Which of the following has the highest boiling point?
1.2,3-dimethylbutane
2.2-methylpentane
3.2,2-dimethylbutane
4.1,2-methylpentane
Which of the following has the highest melting and boiling point?
1.Lithium
2.Phosphorous
3.Carbon
4.Argon
Which of the following is an ore of Aluminium?
1.Galena
2.Cryollite
3.Cinnabar
4.Epsom Salt
Which of the following is not a type of chemical weathering?
1.Corrosion
2.Solution
3.Oxidation
4.Carbonation
which of the following molecule contains a nonpolar covalent bond?
1.Br2
2.CO2
3.CCl4
4.CO
Which of the following molecules is joined by a double covalent bond?
1.Cl2
2.O2
3.N2
4.He2
Which of the following statements is not true?
1.Bacteria present in the mouth produce acids by degradation of sugar and food particles remaining in the mouth.
2.When pH of the mouth is higher than 5.5. then tooth decay starts.
3. Tooth enamel made of calcium phosphate is the hardest substance in the body.
4.Using toothpaste, which are generally basic, helps neutralise the excess acid and prevent tooth decay.
Which one of the following cell organelles mainly functions as storehouse of digestive enzymes?
1.Desmosome
2.Ribosome
3.Lysosome
4.Vacuoles
Which one of the following is commonly used as an indicator to measure the exact pH?
1.Eosin
2.Phenolphthalein
3.Universal indicator
4.Litmus
Which one of the following is the correct relation between the Kelvin temperature (T) and the Celsius temperature (fc)?
1. These are two independent temperature scales
2.T = tc
3.T = tc - 273.15
4. T = tc + 273.15
Which process is a chemical change?
1.Burning gasoline
2.Boiling water
3.Evaporating water
4.Melting ice