Match the following lists: List-I List-II Crop bred by hybridization Resistance to disease (A) Wheat (I) Block rot and curl blight black rot (B) Brassica (II) Mosaic virus, leaf curl (C) Cauliflower (III) Leaf and stripe rust, hill bunt (D) Cowpea (IV) White rust (V) Bacterial blight The correct match is:

A = III , B = IV , C = I , D = V

A = IV , B = III , C = V , D = II

A = IV , B = III , C = V , D = I

A = II , B = IV , C = V , D = I

EASY

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The following details are regarding these three compounds: (A) $N_{2}$ , (B) $N_{2} H_{4}$ and (C) $N_{2} F_{2}$ .

The bond-lengths (between $N -$ atoms) have been found as $1.45$ $Å$ , $1.10$ $Å$ and $1.22$ $Å$ , but not in the correct order.

Which option represents the incorrect matching of compounds with their bond-lengths (between $N -$ atoms)?

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Important Questions on Chemical Bonding and Molecular Structure

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Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Hybridization

Golden rice is genetically engineered to have greater content of _________.

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Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Hybridization

Now-a-days agricultural practice is expensive to the farmers as they need to purchase hybrid seeds every year. Which of the following strategies can be employed to overcome this problem?

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Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Hybridization

'Sonalika' and Kalyansona' are the high yielding 'semi-dwarf varieties of wheat, introduced from ________.

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Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Hybridization

Which of the following is not an objective of biofortification in crops?

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Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Hybridization

In mung bean, resistance to yellow mosaic virus and powdery mildew were induced by:

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Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Hybridization

Mutations in plant cells can be induced by:

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Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Hybridization

The oil content and quality of groundnut variety were improved by plant breeding techniques. This is an example of

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Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Hybridization

You have obtained a high-yielding variety of tomato. Name and explain the procedure that ensures retention of the desired characteristics repeatedly in large populations of future generations of the tomato crop.

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Hybridization

Match the following lists:

	List-I		List-II
	Crop bred by hybridization		Resistance to disease
(A)	Wheat	(I)	Block rot and curl blight black rot
(B)	Brassica	(II)	Mosaic virus, leaf curl
(C)	Cauliflower	(III)	Leaf and stripe rust, hill bunt
(D)	Cowpea	(IV)	White rust
		(V)	Bacterial blight

The correct match is:

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Hybridization

Choose the correct combinations
I) Pusa swarnim - Brassica - White rust resistance
II) Pusa gaurav - Brassica - Fruit borer resistance
III Pusa sawani - Bhindi - Fruit borer resistance
IV) Pusa sadabahar - Chilli - Leaf curl resistance

MEDIUM

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Hybridization

Select the incorrect statement on Mutations ?

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Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Hybridization

In grafting, a part of one plant is inserted on another rooted plant, the former in this union is called ______.

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Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Hybridization

The entire collection of plants having diverse alleles for all genes

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Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Hybridization

Which one of the following is NOT enriched by vitamin C by IARI?

EASY

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Hybridization

Arrange the following steps in plant breeding in an order
(a) Evaluation and selection of parents
(b) Selection of testing of superior recumbents
(c) Collection of variability
(d) Testing, release, commercialization of new varieties
(e) Cross hybridization among the selected parents

HARD

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Hybridization

What is plant breeding? Explain the two steps involved in classical plant breeding.

HARD

Chemistry>Inorganic Chemistry>Chemical Bonding and Molecular Structure>Hybridization

Study the given table and identify a, b, c, d, e and f: