IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: Which structure is not part of the Endomembrane System? 1979 0

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    Chloroplast
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    गलत
  • 2
    Plasma membrane
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    गलत
  • 3
    Nuclear envelope
    सही
    गलत
  • 4
    Golgi apparatus
    सही
    गलत
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उत्तर : 1. "Chloroplast"
व्याख्या :

Answer: A) Chloroplast Explanation: The endomembrane system is composed of the different membranes that are suspended in the cytoplasm within a eukaryotic cell. These membranes divide the cell into functional and structural compartments or organelles. In eukaryotes, the organelles of the endomembrane system include the nuclear membrane, the endoplasmic reticulum, the Golgi apparatus, lysosomes, vesicles, endosomes and the cell membrane, among others.

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उत्तर : 4. "45 kg"
व्याख्या :

Answer: D) 45 kg Explanation: Let the ratio of initial quantity of oils be 'x' => 4x, 5x & 8x.Let k be the quantity of third variety of oil in the final mixture.Let the ratio of initial quantity of oils be 'y'From given details,4x + 5 = 5y ..... (1)5x + 10 = 7y .....(2)8x + k = 9y ......(3) By solving (1) & (2), we getx = 5 & y = 5 From (3) => k = 5 Therefore, quantity of third variety of oil was 9y = 9(5) = 45kg.

प्र: Which is the highest gallantry award in India? 1978 0

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    Param Vir Chakra
    सही
    गलत
  • 2
    Kirti Chakra
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    गलत
  • 3
    Vir Chakra
    सही
    गलत
  • 4
    Param Vishishtat Seva Medal
    सही
    गलत
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उत्तर : 1. "Param Vir Chakra"
व्याख्या :

Answer: A) Param Vir Chakra Explanation: Param Vir Chakra (PVC) is India's highest military decoration awarded for the displaying distinguished acts of valor during the war.   Ashok Chakra Award – An Indian military decoration awarded for valour, courageous action or self-sacrifice away from the battlefield. It is the peacetime equivalent of the Param Vir Chakra. Kirti Chakra – Second in order of precedence of peacetime gallantry awards. Maha Vir Chakra (MVC) is literally called a great warrior medal. Vir Chakra is an Indian gallantry award presented for acts of bravery in the wars.

प्र: Which process allows water to enter the atmosphere? 1978 0

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    Transpiration
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    Respiration
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    Condensation
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  • 4
    Evaporation
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उत्तर : 4. "Evaporation"
व्याख्या :

Answer: D) Evaporation Explanation: Evaporation is the process that allows water to enter into the atmosphere. Sunlight turns liquid water into water vapor which then rises higher into the atmosphere and forms into clouds.   Plants, too, help water get into the atmosphere through a process called transpiration.

प्र: Which statement describes the term salary? 1978 0

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    Salary refers to the fixed amount paid on a daily basis.
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  • 2
    Salary refers to the varying amount paid on a daily basis.
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  • 3
    Salary refers to the fixed amount paid on a weekly, bi-weekly, or monthly basis.
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  • 4
    None of the above
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उत्तर : 3. "Salary refers to the fixed amount paid on a weekly, bi-weekly, or monthly basis."
व्याख्या :

Answer: C) Salary refers to the fixed amount paid on a weekly, bi-weekly, or monthly basis. Explanation: A salary is best described as a fixed amount of income that is paid to an individual on a weekly, bi-weekly or monthly basis.   A salary can also be described as the annual earnings paid out over a year.

प्र: Which type of molecules polar or nonpolar dissolves in water? 1977 0

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उत्तर :
व्याख्या :

In general, polar solvents dissolve polar solutes, and nonpolar solvents dissolve nonpolar solutes.As water molecules are polar, polar molecules dissolves in water.

प्र: A Step-Up Transformer Increases 1976 0

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    Power
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    गलत
  • 2
    Current
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    गलत
  • 3
    Frequency
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    गलत
  • 4
    Voltage
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उत्तर : 4. "Voltage"
व्याख्या :

Answer: D) Voltage Explanation: A transformer that increases voltage from primary to secondary (more secondary winding turns than primary winding turns) is called a Step-Up Transformer. Conversely, a transformer designed to do just the opposite is called a Step-Down Transformer.

प्र: Which is a characteristic of a Mixture? 1976 0

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    a pure substance
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    chemically comined
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    they can be mixed in some fixed ratio
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    गलत
  • 4
    it is either homogenous or heterogenous
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उत्तर : 4. "it is either homogenous or heterogenous"
व्याख्या :

Answer: D) it is either homogenous or heterogenous Explanation: A mixture is the blending of two or more dissimilar substances.   Characteristics of a Mixture: 1. It has No formula. 2. It is an impure sustance 3. They can be mixed in any ratio. 4. The properties of the mixture are the properties of its constituents. 5. Constituents can e easily seperated by physical methods.eg: Heating, Drying, Crystallization, Distillation etc... 6. It is either homogenous or heterogenous.   A major characteristic of mixtures is that the materials do not chemically combine. Mixtures can be divided into those that are evenly distributed (homogeneous) and those that aren't (heterogeneous).

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