DSSSB TGT c9sephomog — practice questions
12 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice DSSSB TGT c9sephomog in the app →Per NCERT Class 9 Science, what is CRYSTALLIZATION?Per NCERT, on what principle is purification by CRYSTALLIZATION based?Per NCERT's Activity 5.3, why is a drop of DILUTE SULFURIC ACID added when crystallizing copper sulfate?Per NCERT, what produces LARGER, well-shaped crystals when cooling a saturated solution?Per NCERT, what is DISTILLATION used for?Per NCERT, distillation effectively separates two liquids if their boiling points differ by at least approximaPer NCERT, when distilling a mixture of ACETONE (boiling point ~56 °C) and WATER (boiling point 100 °C), whichPer NCERT, FRACTIONAL DISTILLATION is used when the boiling points of the liquids differ by approximately whatPer NCERT, in PAPER CHROMATOGRAPHY, what causes the components of a mixture (e.g. ink) to separate?Per NCERT, the word 'chromatography' comes from which Greek roots?Per NCERT, when seawater is allowed to evaporate, what is left behind — illustrated in Activity 5.4 (Fig 5.9)?Per NCERT, the DEG-BHAPKA method used in Kannauj is a traditional Indian application of which separation techn