acids, bases and salts — Science STD 10 — Question

An old person suffering from near-sightedness and a far-sightedness uses ______________ to rectify his vision. (Spectacles with bi-focal lenses, Concave lenses, Convex lenses)

In plasmodium, asexual reproduction occurs through _________. (Multiple fission, Binary fission, Budding)

Molecular formula of gypsum is _________ .(CaSO₄·2H₂O, CaCO₃, NaCl)

If fertilisation of ovum does not occur in female, then .......... happens. (pregnancy, menstruation, bleeding)

The enzyme __________ digests starch and converts it into maltose.(Amylase, Pepsin, Trypsin)

A problem of _________ is due to entry of non-biodegradable substance.  (Biological magnification, Eutrophication, Acid rain)

__________ had discovered the magnetic effect of electric current. (Oersted, Faraday, Tesla)

Micelles forms an __________ in water. (Emulsion, Precipitate, Suspension)

Use of _________ chemical is hazardous for ozone layer. (CFC, Nitrous oxide, Carbon dioxide)

While passing through the prism the light ray travelling from air to glass bends towards the ______________ (Normal, Surface, Horizontal)