Q. A non-electronic conductor is -
1) Iron
2) Gas carbon
3) Copper Sulphate
4) Mercury
Q. Which one of the following minerals does not contain Oxygen?
1) Haematite
2) Bauxite
3) Cryolite
4) Calcite
Q. The chemical name of common salt is -
1) Sodium Chloride
2) Sodium Bicarbonate
3) Sodium
4) Sodium Oxide
Q. In an ER diagram, an ellipse represents -
1) Relation
2) Attributes
3) fields
4) Key
Q. Hard copies can be obtained from -
1) Scanner
2) Speaker
3) Printer
4) Recorder
Q. If a wire of resistance R is melted and recast to half of its length, then the new resistance of the wire will be -
1) R/4
2) R/2
3) R
4) 2R
Q. Which of these waves can be polarised?
1) Sound waves in the air
2) Longitudinal wave on a string
3) Transverse waves on a string
4) Light waves
Q. The best example of Polyembryony is -
1) Cocoa
2) Capsicum
3) Citrus
4) Cycas
Q. Which of the following is a chromoprotein?
1) Mucin
2) Haemoglobin
3) Peptones
4) Vitelline
Q. Root Hairs arise from -
1) Cortex
2) Pericycle
3) Epidermis
4) Endodermis
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