MCQ 11 Mark
The astronomical object closest to us is the $………$
View full question & answer→MCQ 21 Mark
A group of students from $\text{COEP}$ Pune sent a small satellite $…….$ through $\text{ISRO}$ in $2016.$
View full question & answer→MCQ 31 Mark
If a spacecraft is to be sent to travel to outer space.it must have minimum velocity of $…………$
- ✓
$11.2 \ km/s$
- B
$11.6\ km/s$
- C
$13.2\ km/s$
- D
$1.4\ m/s$
AnswerCorrect option: A. $11.2 \ km/s$
$11.2 \ km/s$
View full question & answer→MCQ 41 Mark
The first artificial satellite $……$was sent to space by the Soviet Union in $1957.$
View full question & answer→MCQ 51 Mark
The first person to step on the moon is $…….$
View full question & answer→MCQ 61 Mark
Due to$………..$ we can gather information about worldwide events sitting at home.
View full question & answer→MCQ 71 Mark
Generally,$……..$is called spirit.
View full question & answer→MCQ 81 Mark
At room temperature ethanol is $……$
View full question & answer→MCQ 91 Mark
$…….$is one of the combustible components of $\text{L.P.G.}$
View full question & answer→MCQ 101 Mark
The general molecular formula for the homologous series of alkynes is $………$
- A
$\mathrm{C}_n \mathrm{H}_{2 \mathrm{n}}$
- B
$\mathrm{C}_{\mathrm{n}} \mathrm{H}_{2 \mathrm{n}}+2$
- ✓
$C_n H_{2 n}-2$
- D
$\mathrm{C}_n \mathrm{H}_{2 n}-1$
AnswerCorrect option: C. $C_n H_{2 n}-2$
$C_n H_{2 n}-2$
View full question & answer→MCQ 111 Mark
While going in an increasing order of the length there is a rise in the molecular mass of the members by$…….$
- A
$14 u$
- ✓
$15u$
- C
$16 u$
- D
$17u$
View full question & answer→MCQ 121 Mark
From the following hydrocarbon $…………$is the cyclic hydrocarbon.
View full question & answer→MCQ 131 Mark
The phenomenon in which compounds having different structural formulae have the same molecular formula is called $…………$
View full question & answer→MCQ 141 Mark
The unsaturated hydrocarbons whose structures contain a carbon$-$carbon triple bond are called $……..$
View full question & answer→MCQ 151 Mark
The unsaturated hydrocarbons containing a carbon$-$carbon double bond are called$…....$
View full question & answer→MCQ 161 Mark
The molecule mass of a carbon compound is spread over a range of $…..$
- ✓
$10^{12}$
- B
$10^{14}$
- C
$10^{10}$
- D
$10^{13}$
AnswerCorrect option: A. $10^{12}$
$10^{12}$
View full question & answer→MCQ 171 Mark
The bond between two oxygen atoms is $…………$bond .
View full question & answer→MCQ 181 Mark
Number of valence electrons in a carbon atom is$…….$
View full question & answer→MCQ 191 Mark
Generally the melting and boiling point of carbon compounds are found to be less than $……...^\circ \mathrm{c}$
View full question & answer→MCQ 201 Mark
The minerals from which the metal can be separated economically are called $………$
View full question & answer→MCQ 211 Mark
When one of the metals in an alloy is mercury the alloy is called$………..$
View full question & answer→MCQ 221 Mark
Tin is an alloy of $……….$
View full question & answer→MCQ 231 Mark
$……….$ forms a green colour in the water.
- A
$\mathrm{CuSO}_4$
- ✓
$\mathrm{FeSO}_4$
- C
$\mathrm{NaCl}$
- D
AnswerCorrect option: B. $\mathrm{FeSO}_4$
$\mathrm{FeSO}_4$
View full question & answer→MCQ 241 Mark
$………$is the least reactive metal.
View full question & answer→MCQ 251 Mark
$………..$is a good conductor of heat but a bad conductor of electricity.
View full question & answer→MCQ 261 Mark
Ionic compounds are electrically $………$
View full question & answer→MCQ 271 Mark
$…………$ exist in a liquid state at room temperature.
View full question & answer→MCQ 281 Mark
The sound of one metal colliding with another makes a noise, this property is called as $……………$
View full question & answer→MCQ 291 Mark
In preparation of Aqua regia hydrochloric acid and$………….$acid are mixed.
View full question & answer→MCQ 301 Mark
To prevent corrosion of iron and steel $…….$ method is used .
View full question & answer→MCQ 311 Mark
Corrosion of silver causes a black layer of $…………$
View full question & answer→MCQ 321 Mark
Extraction of moderately reactive elements is done by $……$ and $……..$ method.
- A
- ✓
- C
separation and calcination
- D
View full question & answer→MCQ 331 Mark
The chemical formula of zinc blend is$…..$
- A
$\mathrm{ZnSO}_4$
- ✓
$\ce{ZnS}$
- C
$\mathrm{ZnCO}_3$
- D
$\text{ZnO}$
AnswerCorrect option: B. $\ce{ZnS}$
$\ce{ZnS}$
View full question & answer→MCQ 341 Mark
Atomic number of aluminium is $....…$ and its electronic configuration is$………$
- ✓
$13, ( 2, 8, 3)$
- B
$12 ( 2, 8, 2)$
- C
$13, (3, 10)$
- D
$12, (2, 10)$
AnswerCorrect option: A. $13, ( 2, 8, 3)$
$13, ( 2, 8, 3)$
View full question & answer→MCQ 351 Mark
Aluminium oxide is $……….$oxide
View full question & answer→MCQ 361 Mark
In Wilfley table method to separate particles of gangue$……….$method is used.
View full question & answer→MCQ 371 Mark
Which of the following method is used to prevent the accumulation of greenish layer on brass due to corrosion
MCQ 381 Mark
If $\ce{Cu, Fe, Zn, Al}$ elements are arranged in increasing order of their reactivity. Then the correct order would be which of the following?
- ✓
$\ce{Cu, Fe, Zn, Al}$
- B
$\ce{Al, Cu, Fe, Zn}$
- C
$\ce{Zn, Al, Cu, Fe}$
- D
$\ce{Fe, Zn, Al, Cu}$
AnswerCorrect option: A. $\ce{Cu, Fe, Zn, Al}$
$\ce{Cu, Fe, Zn, Al}$
View full question & answer→MCQ 391 Mark
Iron is$…….$
- A
- B
more reactive than aluminium
- C
less reactive than copper
- ✓
less reactive than aluminium
AnswerCorrect option: D. less reactive than aluminium
less reactive than aluminium
View full question & answer→MCQ 401 Mark
In electrolytic reduction of alumina $…………$ is used as a cathode.
View full question & answer→MCQ 411 Mark
$……….$is basic oxide .
AnswerCorrect option: B. $\mathrm{K}_2 \mathrm{O}$
$\mathrm{K}_2 \mathrm{O}$
View full question & answer→MCQ 421 Mark
$………..$is an alloy made from iron, nickel and chromium.
View full question & answer→MCQ 431 Mark
Bronze is an alloy of$…….$
View full question & answer→MCQ 441 Mark
$…………$ is a combination of two convex lenses with a small focal length.
View full question & answer→MCQ 451 Mark
$…….$ times larger images can be obtained by using a simple microscope.
View full question & answer→MCQ 461 Mark
Bifocal lens is required to correct $……………$defect.
View full question & answer→MCQ 471 Mark
In hypermetropia the human eye $………...$
- ✓
can see distant objects clearly
- B
can see nearby objects distinctly
- C
cannot see nearby as well as distant objects clearly
- D
can’t see nearby as well as distant objects clearly
AnswerCorrect option: A. can see distant objects clearly
can see distant objects clearly
View full question & answer→MCQ 481 Mark
Due to elongation of$………….$and increase in curvature of the eye lens, a person cannot see distant objects clearly.
View full question & answer→MCQ 491 Mark
In Myopia the human eye$…...$
- A
cannot see nearby objects distinctly
- ✓
cannot see distant objects clearly
- C
cannot see nearby as well as distant objects clearly
- D
can see nearby as well as distant objects clearly
AnswerCorrect option: B. cannot see distant objects clearly
cannot see distant objects clearly
View full question & answer→MCQ 501 Mark
For a specific glass lens $f=0.5.$ This is the only Information given to the student. Which type of lens is given to him and what is its power?
- A
power $2D$ ; convex lens
- B
power $1D$ ; concave lens
- ✓
power $-0.5$ ; concave lens
- D
power $-0.25 D$ ; convex lens
AnswerCorrect option: C. power $-0.5$ ; concave lens
power $-0.5$ ; concave lens
View full question & answer→