General Science: Questions and Answers
(Chapter: 25)
796. What is the use of a commutator?
To change the direction of electric current
797. Which is known as 'the stress hormone' in plants?
Abscisic acid
798. What are the examples for the day-neutral plants?
Tomato & cotton
799. Which plant hormone is found in the leaves & fruits?
Abscisic acid
800. The biological nitrogen fixation occurs in roots of leguminous plants with a symbiotic association with -------------- bacteria?
Rhizobium bacteria
801. The plants that make their own food by the mechanism of photosynthesis is known in which name?
Autotrophs
802. Few plants, especially fungi, cannot make their own food & depends on others. They are called as ---------------
Heterotrophs
803. Which macronutrient is essential for the enzyme activation, water balance, ion balance & stomatal opening in plants?
Potassium
804. Malacophily is the pollination by --------------- in plants?
Snails
805. The pollination by ants in plants is known as -------------
Myrmecophily
806. Which part of the flower develops as pericarp of fruit after fertilisation?
ovary 807. Which gases are the constituents of the Ammonia gas?
Nitrogen and hydrogen
808. When copper sulfate is mixed with lime, it is known as .
Bordeaux mixture
809. What is the most common use of Bordeaux mixture?
Fungicide
810. Benzodiazepine is the most commonly used -----------------
Psychoactive drug (Sleeping pill)
811. What is used to change the direction of electric current?
Commutator
812. A rocket works on the principle of conservation of ------------
LinearMornentum
813. In surgery, metal pins are used for holding the broken bones together. It is made of ----------
Stainless steel
814. Why the cloudy nights are warmer com¬pared to clear cloudless nights?
Clouds reflect back the heat given off by Earth
815. The plants which depend on other plants for mechanical support is known as.
Epiphytes
816. Kilowatt Hour is the unit of.
Energy
817. Where is the Atlas bone in the human body situated?
Neck
818. Which instrument is used to record the growth of plants?
Crescograph
819. Water pipes burst in severe winter at hill stations because of.
Water in the pipes expands on freezing
820. Which gas helps for the artificial ripening of fruits?
Acetylene
821. What is the source of energy in an artificial satellite?
Solar cells
822. The energy from the Sun is received by Earth through.
Radiation
823. The speed of a missile is mentioned in the unit of --------------
Mach
824. Which parts of the body are connected by the eustachian tube?
Ear&throat
825. Which device is used for detecting even feeble current?
Galvanoscope
826. Name the acid in which the glass dissolves?
Hydrofluoric Acid
827. Which is the only part of the human body that remains in the same size from birth to death?
Eyeballs
828. Which element has the atomic number 100?
Fermium
829. Which physical property does the colour of a star indicate?
Temperature
830. A vehicle silencer works on which prin¬ciple of the sound wave?
Destructive Interference
(Chapter: 25)
796. What is the use of a commutator?
To change the direction of electric current
797. Which is known as 'the stress hormone' in plants?
Abscisic acid
798. What are the examples for the day-neutral plants?
Tomato & cotton
799. Which plant hormone is found in the leaves & fruits?
Abscisic acid
800. The biological nitrogen fixation occurs in roots of leguminous plants with a symbiotic association with -------------- bacteria?
Rhizobium bacteria
801. The plants that make their own food by the mechanism of photosynthesis is known in which name?
Autotrophs
802. Few plants, especially fungi, cannot make their own food & depends on others. They are called as ---------------
Heterotrophs
803. Which macronutrient is essential for the enzyme activation, water balance, ion balance & stomatal opening in plants?
Potassium
804. Malacophily is the pollination by --------------- in plants?
Snails
805. The pollination by ants in plants is known as -------------
Myrmecophily
806. Which part of the flower develops as pericarp of fruit after fertilisation?
ovary 807. Which gases are the constituents of the Ammonia gas?
Nitrogen and hydrogen
808. When copper sulfate is mixed with lime, it is known as .
Bordeaux mixture
809. What is the most common use of Bordeaux mixture?
Fungicide
810. Benzodiazepine is the most commonly used -----------------
Psychoactive drug (Sleeping pill)
811. What is used to change the direction of electric current?
Commutator
812. A rocket works on the principle of conservation of ------------
LinearMornentum
813. In surgery, metal pins are used for holding the broken bones together. It is made of ----------
Stainless steel
814. Why the cloudy nights are warmer com¬pared to clear cloudless nights?
Clouds reflect back the heat given off by Earth
815. The plants which depend on other plants for mechanical support is known as.
Epiphytes
816. Kilowatt Hour is the unit of.
Energy
817. Where is the Atlas bone in the human body situated?
Neck
818. Which instrument is used to record the growth of plants?
Crescograph
819. Water pipes burst in severe winter at hill stations because of.
Water in the pipes expands on freezing
820. Which gas helps for the artificial ripening of fruits?
Acetylene
821. What is the source of energy in an artificial satellite?
Solar cells
822. The energy from the Sun is received by Earth through.
Radiation
823. The speed of a missile is mentioned in the unit of --------------
Mach
824. Which parts of the body are connected by the eustachian tube?
Ear&throat
825. Which device is used for detecting even feeble current?
Galvanoscope
826. Name the acid in which the glass dissolves?
Hydrofluoric Acid
827. Which is the only part of the human body that remains in the same size from birth to death?
Eyeballs
828. Which element has the atomic number 100?
Fermium
829. Which physical property does the colour of a star indicate?
Temperature
830. A vehicle silencer works on which prin¬ciple of the sound wave?
Destructive Interference
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