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MCQOPTIONS
This section includes 2268 Mcqs, each offering curated multiple-choice questions to sharpen your Grade7 knowledge and support exam preparation. Choose a topic below to get started.
| 2051. |
The state of matter includes |
| A. | solid |
| B. | liquid |
| C. | gas |
| D. | all of above |
| Answer» E. | |
| 2052. |
The full form of 'SOHO' is |
| A. | Solar Objective and Heliospheric Observatory |
| B. | Solar and Heliospheric Observatory |
| C. | Solar and Hotspot Objective |
| D. | Sun Observatory and Hotspot Objective |
| Answer» C. Solar and Hotspot Objective | |
| 2053. |
It is impossible to see a |
| A. | white dwarf |
| B. | black dwarf |
| C. | black hole |
| D. | white hole |
| Answer» D. white hole | |
| 2054. |
The largest separate aerial telescope is located in |
| A. | America |
| B. | New Mexico |
| C. | Canada |
| D. | Brazil |
| Answer» C. Canada | |
| 2055. |
From ancient times, people have been trying to understand how earth had fit into |
| A. | space |
| B. | atmosphere |
| C. | galaxy |
| D. | solar system |
| Answer» B. atmosphere | |
| 2056. |
The light is reflected into a |
| A. | small concave mirror |
| B. | large convex mirror |
| C. | small convex mirror |
| D. | small plane mirror |
| Answer» E. | |
| 2057. |
The gas which is used as cooling agent is |
| A. | carbon dioxide |
| B. | helium |
| C. | argon |
| D. | nitrogen |
| Answer» E. | |
| 2058. |
Salt, sugar, chalk and sand are all |
| A. | elements |
| B. | compounds |
| C. | mixtures |
| D. | solutions |
| Answer» C. mixtures | |
| 2059. |
When magnesium element is burnt with oxygen it makes a compound called |
| A. | magnesium peroxide |
| B. | magnesium oxide |
| C. | magnesium carbonate |
| D. | magnesia |
| Answer» C. magnesium carbonate | |
| 2060. |
A molecule which breaks and gives of hydrogen and oxygen is |
| A. | water |
| B. | carbon dioxide |
| C. | air |
| D. | sodium chloride |
| Answer» B. carbon dioxide | |
| 2061. |
A process by which new substance is formed, is called |
| A. | chemical symbol |
| B. | chemical formula |
| C. | chemical property |
| D. | chemical reaction |
| Answer» E. | |
| 2062. |
The colors on the disk are mixed |
| A. | by our eyes |
| B. | due to fast rotations |
| C. | due to humidity |
| D. | due to pressure |
| Answer» B. due to fast rotations | |
| 2063. |
The refractive index of soda-lime glass is |
| A. | 0.5 |
| B. | 1 |
| C. | 1.5 |
| D. | 2 |
| Answer» D. 2 | |
| 2064. |
The critical angle for water is |
| A. | 36 degree |
| B. | 42 degree |
| C. | 48 degree |
| D. | 54 degree |
| Answer» D. 54 degree | |
| 2065. |
Tiny rain droplets act like a |
| A. | glass |
| B. | mirror |
| C. | prism |
| D. | drop of oil |
| Answer» D. drop of oil | |
| 2066. |
For refraction of light, the angle of incidence must be |
| A. | equal to zero |
| B. | less than zero |
| C. | greater than zero |
| D. | less than or greater than zero |
| Answer» D. less than or greater than zero | |
| 2067. |
A circuit which splits into two or more branches is called |
| A. | series circuit |
| B. | parallel circuit |
| C. | open circuit |
| D. | close circuit |
| Answer» C. open circuit | |
| 2068. |
A component which provides resistance is called |
| A. | heat |
| B. | energy |
| C. | product |
| D. | resistor |
| Answer» E. | |
| 2069. |
In a parallel circuit the current flowing from the source to each path is |
| A. | greater |
| B. | lesser |
| C. | equal |
| D. | unequal |
| Answer» C. equal | |
| 2070. |
A short thin piece of wire which is heated up and melt by the flowing of electric current in it, is called |
| A. | circuit |
| B. | fuse |
| C. | cell |
| D. | resistor |
| Answer» C. cell | |
| 2071. |
A diagram drawn by using symbols which represents electrical components is called |
| A. | circuit diagram |
| B. | current diagram |
| C. | charges diagram |
| D. | electric diagram |
| Answer» B. current diagram | |
| 2072. |
To form other colors like brown, peach, purple etc. the colors that are required, are |
| A. | red, yellow and green |
| B. | red, blue and orange |
| C. | green, blue and yellow |
| D. | red, green and blue |
| Answer» E. | |
| 2073. |
An example of 'refraction' of light is |
| A. | water |
| B. | wall |
| C. | brick |
| D. | metal |
| Answer» B. wall | |
| 2074. |
As the light moves from one medium to another, its |
| A. | amplitude changes |
| B. | speed changes |
| C. | frequency and wavelength change |
| D. | wavelength changes only |
| Answer» C. frequency and wavelength change | |
| 2075. |
A red "filter" |
| A. | allows green and blue color to pass |
| B. | allows red color to pass |
| C. | allows all colors to pass except red |
| D. | allows yellow color to pass |
| Answer» C. allows all colors to pass except red | |
| 2076. |
In concave lenses, a distant object appears |
| A. | upright |
| B. | virtual |
| C. | magnified |
| D. | inverted |
| Answer» E. | |
| 2077. |
All three isotopes of carbon are combined with oxygen to form |
| A. | carbon monoxide |
| B. | carbon dioxide |
| C. | carbon trioxide |
| D. | carbon tetroxide |
| Answer» C. carbon trioxide | |
| 2078. |
Diatomic gases such as nitrogen, oxygen and chlorine have |
| A. | covalent bonding between their atoms |
| B. | dative bonding between their molecules |
| C. | metallic bonding between their elements |
| D. | strong bonding between their atom |
| Answer» B. dative bonding between their molecules | |
| 2079. |
In a drawing of atom, shells are indicated by |
| A. | rectangles |
| B. | squares |
| C. | circles |
| D. | triangles |
| Answer» D. triangles | |
| 2080. |
Unstable atoms break up into |
| A. | electrons and protons |
| B. | smaller atoms |
| C. | neutrons and protons |
| D. | subatomic particles |
| Answer» C. neutrons and protons | |
| 2081. |
As there are same number of electrons and protons in an atom, atomic number can also be called |
| A. | electron number |
| B. | proton number |
| C. | nucleon number |
| D. | mass number |
| Answer» C. nucleon number | |
| 2082. |
Sound moves in air because |
| A. | temperature is passed on |
| B. | humidity is passed on |
| C. | pressure is passed on |
| D. | heat is passed on |
| Answer» D. heat is passed on | |
| 2083. |
The longer, the echo takes, the |
| A. | shallower the water |
| B. | the deeper the water |
| C. | the denser the water |
| D. | the warmer the water |
| Answer» C. the denser the water | |
| 2084. |
Sound waves spread out from |
| A. | the source |
| B. | air |
| C. | water vapors |
| D. | object |
| Answer» B. air | |
| 2085. |
A component of our body that reflects x-rays is known as |
| A. | heart |
| B. | bones |
| C. | stomach |
| D. | brain |
| Answer» C. stomach | |
| 2086. |
The loss of sound energy depends on |
| A. | the density of an object |
| B. | the matter it is passing through |
| C. | energy level of sound |
| D. | resistance in a matter |
| Answer» C. energy level of sound | |
| 2087. |
Inside cell positive terminal is made of |
| A. | zinc case |
| B. | graphite rod |
| C. | carbon |
| D. | manganese |
| Answer» C. carbon | |
| 2088. |
An appliance which use simple electric circuit is an |
| A. | electric torch |
| B. | microwave oven |
| C. | air conditioner |
| D. | generator |
| Answer» B. microwave oven | |
| 2089. |
In a circuit when an electric current flows in a continuous path, it is called |
| A. | close circuit |
| B. | open circuit |
| C. | hot circuit |
| D. | blocked circuit |
| Answer» B. open circuit | |
| 2090. |
The energy which modern gadgets, devices and machines use is |
| A. | electrical |
| B. | magnetic |
| C. | thermal |
| D. | chemical |
| Answer» B. magnetic | |
| 2091. |
Two or more cells when connected in series make a |
| A. | battery |
| B. | circuit |
| C. | terminal |
| D. | resistor |
| Answer» B. circuit | |
| 2092. |
Sodium and chlorine react together to form |
| A. | sodium chloride |
| B. | sodium oxide |
| C. | sodium carbonate |
| D. | sodium nitrate |
| Answer» B. sodium oxide | |
| 2093. |
The total number of elements is |
| A. | 116 |
| B. | 92 |
| C. | 140 |
| D. | 98 |
| Answer» B. 92 | |
| 2094. |
Coating an object such as key or nail with a thin layer of metal is a process called |
| A. | electrolysis |
| B. | electro coating |
| C. | electroplating |
| D. | electronic induction |
| Answer» D. electronic induction | |
| 2095. |
Passing through two bulbs is |
| A. | difficult for electrons |
| B. | easy for electrons |
| C. | difficult for protons |
| D. | easy for protons |
| Answer» B. easy for electrons | |
| 2096. |
The use of electrical energy |
| A. | costs money |
| B. | causes cancer |
| C. | causes heart disease |
| D. | lung cancer |
| Answer» B. causes cancer | |
| 2097. |
An example of 'semiconductor' is |
| A. | sulphur |
| B. | silver |
| C. | copper |
| D. | silicon |
| Answer» E. | |
| 2098. |
If we add a 13A fuse in a hair drier that requires 2A current, the fuse will |
| A. | remain safe |
| B. | melt |
| C. | blow |
| D. | glow |
| Answer» B. melt | |
| 2099. |
The device captures heat by |
| A. | radio waves |
| B. | Infrared radiations |
| C. | gamma radiations |
| D. | ultraviolet radiations |
| Answer» C. gamma radiations | |
| 2100. |
Sunrays warm up the |
| A. | land before the sea |
| B. | sea before the land |
| C. | land and sea at the same time |
| D. | land but not sea |
| Answer» B. sea before the land | |