MCQOPTIONS
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MCQOPTIONS
This section includes 856 Mcqs, each offering curated multiple-choice questions to sharpen your General Knowledge knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
Which of the following metals can displace copper from copper sulphate solution ? |
| A. | latinum |
| B. | ercury |
| C. | ron |
| D. | old |
| Answer» D. old | |
| 252. |
A matured mammalian cell without nucleus is |
| A. | ymphocyte |
| B. | rythrocyte |
| C. | permatozoan |
| D. | ocyte |
| Answer» C. permatozoan | |
| 253. |
The chemical bahaviour of an atom depends upon |
| A. | he number of protons in its nucleus |
| B. | he number of neutrons in the nucleus |
| C. | he number of electrons orbiting around the nucleus |
| D. | he number of nucleons in the nucleus |
| Answer» D. he number of nucleons in the nucleus | |
| 254. |
Photo-oxidation process is initiated by |
| A. | ight |
| B. | eat |
| C. | xygen |
| D. | atalyst |
| Answer» B. eat | |
| 255. |
Which of the following causes the rusting of iron? a. Oxidation b. Reduction c. Chemical reaction with oxygend. Chemical reaction with CO2 |
| A. | and B |
| B. | and C |
| C. | and D |
| D. | and C |
| Answer» E. | |
| 256. |
Silver gets corroded due to ________ in air. |
| A. | xygen |
| B. | ydrogen Sulphide |
| C. | arbon dioxide |
| D. | itrogen |
| Answer» C. arbon dioxide | |
| 257. |
Colour imparted to the Bunsen flame by strontium salt is |
| A. | luish green |
| B. | pple-green |
| C. | rick red |
| D. | rimson red |
| Answer» E. | |
| 258. |
Which among the following is a covalent compound ? |
| A. | alcium chloride |
| B. | agnesium fluoride |
| C. | odium chloride |
| D. | arbon tetrachloride |
| Answer» E. | |
| 259. |
Who developed the model of atomic structure ? |
| A. | ohr and Rutherford |
| B. | olta |
| C. | lfred Nobel |
| D. | araday |
| Answer» B. olta | |
| 260. |
The third shell of an atom can have a maximum of ______ electrons. |
| A. | 3 |
| B. | 5 |
| C. | 8 |
| D. | 1 |
| Answer» D. 1 | |
| 261. |
How many electrons are there in a Hydrogen atom? |
| A. | ne |
| B. | wo |
| C. | hree |
| D. | our |
| Answer» B. wo | |
| 262. |
In an oxygen molecule, two atoms are united by |
| A. | ne bond |
| B. | wo bonds |
| C. | hree bonds |
| D. | our bonds |
| Answer» C. hree bonds | |
| 263. |
Nucleus of an atom consists of. |
| A. | roton |
| B. | eutron |
| C. | roton and Neutron |
| D. | lectron, Proton and Neutron |
| Answer» D. lectron, Proton and Neutron | |
| 264. |
The electronic configuration of an atom having atomic number ‘20’ is |
| A. | , 8, 10 |
| B. | , 6, 8, 4 |
| C. | , 8, 8, 2 |
| D. | , 10, 8 |
| Answer» D. , 10, 8 | |
| 265. |
Atoms of same element having different mass numbers are called________ |
| A. | sobars |
| B. | sotopes |
| C. | sotones |
| D. | somers |
| Answer» C. sotones | |
| 266. |
________ is a by product of sewage treatment and can be decomposed to produce biogas |
| A. | ewage |
| B. | ludge |
| C. | ewer |
| D. | cum |
| Answer» C. ewer | |
| 267. |
The major constituent of gobar gas is |
| A. | arbon dioxide |
| B. | ethane |
| C. | utane |
| D. | sobutane |
| Answer» C. utane | |
| 268. |
The biogas used for cooking is a mixture of which of the following? |
| A. | arbon dioxide and oxygen |
| B. | sobutane and propane |
| C. | ethane and carbon monoxide |
| D. | ethane and carbon dioxide |
| Answer» E. | |
| 269. |
Spirit in contact with body gives cool sensation because it is : |
| A. | iquid |
| B. | ransparent |
| C. | ighly volatile |
| D. | good conductor |
| Answer» D. good conductor | |
| 270. |
Hydrogen is not found in atmosphere because |
| A. | t is highly inflammable |
| B. | t is the lightest gas |
| C. | t is absorbed by plants |
| D. | t immediately combines with oxygen to form water |
| Answer» C. t is absorbed by plants | |
| 271. |
Which of the following gases will effuse out of football bladder most quickly ? |
| A. | e |
| B. | 2 |
| C. | 2 |
| D. | 2 |
| Answer» C. 2 | |
| 272. |
Which gas is used for converting vegetable oils into saturated fats ? |
| A. | 2 |
| B. | 2 |
| C. | l2 |
| D. | O2 |
| Answer» B. 2 | |
| 273. |
Which of the following could be used as fuel in propellant or rockets ? |
| A. | iquid Hydrogen + Liquid Nitrogen |
| B. | iquid Oxygen + Liquid Argon |
| C. | iquid Nitrogen + Liquid Oxygen |
| D. | iquid Hydrogen + Liquid Oxygen |
| Answer» E. | |
| 274. |
Which one is the naturally occuring heaviest element? |
| A. | ercury |
| B. | horium |
| C. | ranium |
| D. | rotactinium |
| Answer» D. rotactinium | |
| 275. |
Name two elements that find wide application in transistor industry. |
| A. | ilicon and Germanium |
| B. | arbon and Platinum |
| C. | ridium and Germanium |
| D. | ungsten and Platinum |
| Answer» B. arbon and Platinum | |
| 276. |
In surgery, metal pins are used for joining together broken bones. These metal pins remain uncorroded in the body. What is the material of these pins? |
| A. | opper |
| B. | ron |
| C. | luminium |
| D. | itanium |
| Answer» E. | |
| 277. |
Major portion of the earth’s crust is mainly constituted by |
| A. | xygen and Iron |
| B. | xygen and Silicon |
| C. | ilicon and Iron |
| D. | ilicon and Aluminium |
| Answer» C. ilicon and Iron | |
| 278. |
Who is known as the 'father of modern chemistry'? |
| A. | ohn Dalton |
| B. | obert Boyle |
| C. | ntoine Lavoisier |
| D. | emocritus |
| Answer» D. emocritus | |
| 279. |
The National Chemical Laboratory (India) is located in |
| A. | umbai |
| B. | angaluru |
| C. | yderabad |
| D. | une |
| Answer» E. | |
| 280. |
Which among the following is pure matter ? |
| A. | arbon dioxide |
| B. | rass |
| C. | ir |
| D. | ron |
| Answer» B. rass | |
| 281. |
Preparation of ‘Dalda or Vanaspati’ ghee from vegetable oil utilizes the following process : |
| A. | ydrolysis |
| B. | xidation |
| C. | ydrogenation |
| D. | zonolysis |
| Answer» D. zonolysis | |
| 282. |
Which one of the following metals does not react with water to produce Hydrogen ? |
| A. | otassium |
| B. | admium |
| C. | odium |
| D. | ithium |
| Answer» C. odium | |
| 283. |
The gas that is used in the manufacture of vanaspati ghee is : |
| A. | xygen |
| B. | arbon dioxide |
| C. | ydrogen |
| D. | itrogen |
| Answer» D. itrogen | |
| 284. |
The gas which turns into liquid at the lowest temperature among the following is |
| A. | ydrogen |
| B. | xygen |
| C. | elium |
| D. | itrogen |
| Answer» B. xygen | |
| 285. |
When Hydrogen starts burning in air, it produces ? |
| A. | mmonia |
| B. | ater |
| C. | ethane |
| D. | arbonic Acid |
| Answer» C. ethane | |
| 286. |
Carbon monoxide is an inflammable gas. Which one of the following is also inflammable? |
| A. | elium |
| B. | itrogen |
| C. | xygen |
| D. | ydrogen |
| Answer» E. | |
| 287. |
An atom of an element has atomic number 17 and mass number 36. The number of neutrons in its nucleus is |
| A. | 7 |
| B. | 9 |
| C. | 6 |
| D. | 3 |
| Answer» C. 6 | |
| 288. |
Number of neutrons in an atom of hydrogen is |
| A. | ne |
| B. | ero |
| C. | wo |
| D. | hree |
| Answer» C. wo | |
| 289. |
Rutherford’s scattering experiment proved the presence of |
| A. | toms in all matter |
| B. | lectrons in atoms |
| C. | eutrons in atoms |
| D. | ucleus in atoms |
| Answer» E. | |
| 290. |
The gas causing acid rain in an industrial area is |
| A. | arbon dioxide |
| B. | arbon monoxide |
| C. | ulphur dioxide |
| D. | ethane |
| Answer» D. ethane | |
| 291. |
Major gaseous pollutant of the thermal power station is |
| A. | 2 S |
| B. | H3 |
| C. | O2 |
| D. | O2 |
| Answer» E. | |
| 292. |
The pollutant responsible for ozone holes is ________ |
| A. | O2 |
| B. | O2 |
| C. | O |
| D. | FC |
| Answer» E. | |
| 293. |
Oxide of sulphur present in the atmosphere are washed down by rains to cause : |
| A. | epletion of fossil fuel reserves |
| B. | utrophication in lakes |
| C. | owering of pH of soil |
| D. | ndustrial smog formation |
| Answer» B. utrophication in lakes | |
| 294. |
Which of the following metals is not a pollutant ? |
| A. | ercury |
| B. | rsenic |
| C. | ead |
| D. | luminium |
| Answer» E. | |
| 295. |
What are the major pollutants of cigarette smoke? |
| A. | arbon monoxide and dioxin |
| B. | arbon monoxide and nicotine |
| C. | arbon monoxide and benzene |
| D. | ioxin and benzene |
| Answer» C. arbon monoxide and benzene | |
| 296. |
CNG used in automobiles to check pollution, mainly consists of |
| A. | H4 |
| B. | O2 |
| C. | 2 |
| D. | 2 |
| Answer» B. O2 | |
| 297. |
The two metal ions that cause hardness to water are: |
| A. | alcium, Magnesium |
| B. | odium, Calcium |
| C. | odium, Potassium |
| D. | odium, Magnesium |
| Answer» B. odium, Calcium | |
| 298. |
The purest form of water in nature is |
| A. | ain water |
| B. | ake water |
| C. | iver water |
| D. | ea water |
| Answer» B. ake water | |
| 299. |
Which of the following is a monoatomic gas? |
| A. | xygen |
| B. | eon |
| C. | itrogen |
| D. | luorine |
| Answer» C. itrogen | |
| 300. |
What is the chemical symbol of mercury? |
| A. | r |
| B. | g |
| C. | g |
| D. | one of the above |
| Answer» D. one of the above | |